Harken Unit 3 Jib Reefing and Furling

Product Information: MKIV JIB REEFING & FURLING

The Harken Jib Reefing and Furling system is designed for reducing sail size or completely rolling sails on sailboats to minimize the effect of wind on the sail. The product is not covered by limited warranty if used for other applications than normal sailboat usage.

Safety Precautions/Parts Description
The user manual provides technical information on installation and service. The manual is meant for expert users or specialized personnel. Installation, disassembling, and reassembling by non-experts may cause serious damage to property, injury to users, and injury to those in the vicinity of the product. Harken accepts no responsibility for damage or harm caused by not observing the safety requirements and instructions in this manual. The user must have appropriate training to use this product. Please follow all instructions to avoid potential hazards that may cause injury to you and others.

Parts Descriptions

1. Jaw/jaw toggle
2. Link plates
3. Hub extension
4. Shackles
5. Drum assembly
6. Foil clamp
7. 610 mm (2′) bottom foil
8. Feeder
9. Connector bushing
10. Bottom connector
11. 2.13 m (7′) foil
12. Connector screws
13. Connector wedge
14. Connector
15. Halyard swivel
16. Trim cap
17. Trim cap screws

Product Usage Instructions

Preassembly
Before assembling the product, perform the following checks:

• Sizing check
• Parts line/rigging parts check/tools
• Dimensions/sailmaker’s instructions
• Toggle deductions/stay into foil options
• Top foil length
• Unit 3/Unit 4 Short top foil
• Unit 3/Unit 4 Confirm foil length

Assembly
Follow the below steps for assembly:

• Connect the foils and connectors
• Attach the halyard swivel and drum assembly
• Attach the rod rigging and turnbuckle/toggle
• Attach toggle/short length plate
• Attach toggle/long length plate
• Attach feeder/final

Commissioning–Unit 4
Tie soft attachment tack/head/halyard before commissioning Unit4.

Operation
Follow the below steps for operation:

• Halyards/headstay tension
• Raise sails/storm sails/reefing
• Reef/secure sail
• Race conversion

Maintenance
Clean/inspect regularly. Replace line if worn out. Remove furler before storage.

Troubleshoot
Refer to the warranty appendix for troubleshooting and contact Harken if required.

MKIV JIB REEFING & FURLING
Unit 3, 4
Installation Manual ­ Intended for specialized personnel or expert users
Preassembly Safety precautions/parts descriptions Sizing check Parts Line/rigging parts check/tools Dimensions/sailmaker’s instructions Toggle deductions/stay into foil options Top foil length Unit 3/Unit 4 Short top foil Unit 3/Unit 4 Confirm foil length
Assembly Foils/connectors Halyard swivel Drum assembly Rod rigging Attach turnbuckle/toggle Attach toggle/short length plate Attach toggle/long length plate Feeder/final
Commissioning­Unit 3/4 Turnbuckle on boat Lead line to cockpit Halyard wrap/prevent halyard wrap Pendant/halyard: restrainer/ halyard tension
Commissioning–Unit 4 Tying soft attachment tack/head/halyard
Operation Halyards/headstay tension Raise sails/storm sails/reefing Reef/secure sail Race conversion
Maintenance Clean/inspect Replace line Storage/remove furler
Troubleshoot Warranty Appendix

4673 v2 04/22
2 3 4 – 5 6 7 8 9 -10 11 – 12 13
14 – 20 20 21 22 23 24 25 26
27 28 29 30
31
32 33 34 35
36 36 36 37 37 38 – 41

Please read these instructions carefully before installing, servicing, or operating the equipment. This manual may be modified without notice. See: www.harken.com/manuals for updated versions.

PLEASE SAVE THESE INSTRUCTIONS

4673_MKIV-Unit-3-4_Manual 8.5 x 11″ final trim size 44 pages Prints two sides

Saddlestitch Black ink only

Safety Precautions/Parts Description

Introduction This manual gives technical information on installation and service. The information is destined exclusively for specialized personnel or expert users. Installation, disassembling, and reassembling by personnel who are not experts may cause serious damage to property, injury to users, and injury to those in the vicinity of the product. If you do not understand an instruction, contact Harken.
The user must have appropriate training in order to use this product.
Harken accepts no responsibility for damage or harm caused by not observing the safety requirements and instructions in this manual. See Limited Warranty, General Warnings and Instructions at www.harken.com/manuals.
Purpose Harken Jib Reefing and Furling systems are designed for rolling sails on sailboats to reduce sail size or to completely roll so wind has little effect on the sail. Use of this product for other than normal sailboat applications is not covered by the limited warranty.

Safety Precautions

WARNING! This symbol alerts you to potential hazards that may kill or hurt you and others if you don’t follow instructions. The message will tell you how to reduce the chance of injury.

CAUTION!

This symbol alerts you to potential hazards that may hurt you and others if you do not follow instructions. The message will tell you how to reduce the chance of injury.

WARNING! Strictly follow all instructions to avoid potential hazards that may kill or hurt you and others. See www.harken.com/manuals

7

for General Warnings and Instructions.

8

6

5

2 3
1

4 5

Parts Descriptions 1) Jaw/jaw toggle 2) Link plates 3) Hub extension 4) Shackles
2

Unit 4 soft attachment

5. Drum assembly 6) Foil clamp 7) 610 mm (2′) bottom foil 8) Feeder

6. Connector bushing 10) Bottom connector 11) 2.13 m (7′) foil 12) Connector screws
   MKIV Unit 3 and 4

7. Connector wedge 14) Connector 15) Halyard swivel 16) Trim cap

8. Trim cap screws

Preassembly

Sizing Check 17
16 15

9 10

13 14
12 11

15 Unit 4 soft attachment

Size Check 1. Check headstay and clevis pin dimensions in chart below.

This manual shows both black and clear foils. In April 2021 MKIV furlers began shipping with black foils. Clear anodized foils also available.

WARNING! Do not drill boat’s chainplate or toggle. This may result in rig failure. Use the correct size toggle and clevis pin.

2. Harken does not recommend drilling boat’s chainplate or toggle. Bushings may be required to fit boats with smaller clevis pin sizes.
3. Will drum fit on bow? See page 7. If necessary, use an additional toggle to slightly raise unit. To clear anchor use a Harken long link plate which can be cut to various lengths.

UNIT 3

UniPart no.
7413.10
Toggle part no. 7413.20 3/4 7413.20 7/8 7313.21 3/4 7313.21 7/8 Part no.
7414.10
Toggle part no. 7414.20 7/8 7414.20 1 7414.20 11/8

Description
MKIV Unit 3 Note: Black foils standard.
Silver foils available.
Description Jaw/jaw toggle w/short link plate Jaw/jaw toggle w/short link plate Long link plate w/jaw/jaw toggle Long link plate w/jaw/jaw toggle

Wire Ø

7/16″, 1/2″

11 mm, 12 mm

Rod Ø

-22, -30

9.53 mm, 11.1 mm

Chainplate clevis Ø

3/4″

19.1 mm

7/8″

22.2 mm

3/4″

19.1 mm

7/8″

22.2 mm

Description

MKIV Unit 4 Note: Black foils standard.
Silver foils available.
Description Jaw/jaw toggle w/short link plate Jaw/jaw toggle w/short link plate Jaw/jaw toggle w/short link plate

Wire Ø

1/2″, 9/16″, 5/8″

12 mm, 14 mm, 16 mm

Rod Ø

-30, -40, -48 11.1 mm, 12.7 mm, 14.3 mm

Chainplate clevis pin Ø

7/8″

22.2 mm

1″

25.4 mm

11/8″

28.57 mm

MKIV Unit 3 and 4

UNIT 4

Chainplate Clevis Pin 3

Preassembly

2.13 m (10 – 7′) foils Unit 3, 4

Parts
2′ (610 mm) Bottom Foil

Halyard swivel unit 3

Silver foils available

Drum assembly unit 3

Halyard swivel unit 4
Drum assembly unit 4

Main components – Unit 3

Description

Unit

Part No.

Qty

Drum assembly with clamp

HFG944

1

2.13 m (7′) foil Standard

7413.30.BLACK

10

610 mm (2′) bottom foil Standard

7413.33.BLACK

1

3

2.13 m (7′) foil (Special)

7413.30.CLEAR

10

610 mm (2′) bottom foil (Special)

7413.33.CLEAR

1

Halyard swivel

H-39392

1

Main components – Unit 4

Description

Unit

Part No.

Qty

Drum Assembly

HFG945

1

2.13 m (7′) foil – Standard

7414.30.BLACK

10

610 mm (2′) bottom foil – Standard

7414.33.BLACK

1

4

2.13 m (7′) foil (Special)

7414.30.BLACK

10

610 mm (2′) bottom foil – (Special)

7414.33.BLACK

1

Halyard swivel

H-45788

1

4

MKIV Unit 3 and 4

Connector bushings

Plastic connector wedges

Foil screws

Trim cap

Bottom connector

Connectors

Other Components

Description

Unit

Connector

Bottom connector

Connector bushing set

Plastic connector wedge set

Foil screw set

Trim cap set

Trim cap screw set

3

Prefeeder

Feeder with screw and tab

10 mm bow shackle

Blue Loctite® adhesive (for toggle link plates) Red Loctite® adhesive (for screws)

Injector, 1 oz. 5200 adhesive

Connector Bottom connector Connector bushing set Plastic connector wedge set Foil screw set

Trim cap set

4

Trim cap screw set

Prefeeder

Feeder with screw and tab

Blue Loctite® adhesive (for toggle link plates)

Red Loctite® adhesive (for screws)

Injector, 1 oz. 5200 adhesive

Trim cap screws

Feeder

Part No.
7413.31F
7413.32F HFG297
(20 EA H-42073/H-42074)
HFG324
(22 EA H-39487)
HFG349
( 46 EA HFS1106)
HFG682 HFG672
( 3 EA HFS1127)
947
H-39756
2124
833
HFG739
HFG725
7414.31F
7414.32F HFG946
(H-45542/H-45543)
HFG947
( 24 EA H-45509)
HFG948
( 48 EA HFS1176)
HFG949
(H-45550/H-45551)
HFG672
(3 EA HFS1127)
947
H-45482
833
HFG739
HFG725

Qty

Size

9 248 mm (9.75″)

1

356 mm (14″)

Prefeeder

1

—

1

—

Bow shackles unit 3 only

1

—

1

—

Blue Loctite® adhesive

1

—

1

—

1

—

3

10 mm

1

—

2

—

1

1 oz.

9 272 mm (10.7″) 1 386 mm (15.2″)

Red Loctite® adhesive

5200 adhesive Injector

1

—

1

—

1

1

—

1

—

Unit 3 3,4, 6, 10 mm
Unit 4 5, 6 mm

1

—

Loctite is a registered trademark of Henkel AG & Company KGaA.

1

—

Tools

1

Description

Unit

Qty

2

—

3, 4, 6, 10 mm hex keys

1

1 oz

5, 6 mm hex keys

3

1 each

4

1 each

MKIV Unit 3 and 4

Loctite is a registered trademark of Henkel AG & Company KGaA5.

Preassembly

Line/Rigging Parts Check/Tools

Line Diameter/Length

Furling line is not included with furling unit. Purchase 12 mm (7/16″) low – stretch polyester double – braid line. Line length should be equal to the length of the boat, plus the length of the foot of the largest genoa, plus 2 m (6′).

Toggles
1. Harken toggle assembly required. Sold separately.
2. Mating turnbuckle components, with eye at lower end, must be purchased separately. See page 8.
3. Headstay might require cutting and shortening to fit Harken toggle. Some headstays may remain uncut by replacing lower stud of turnbuckle with stud/eye, eliminating extra toggle.
4. Rod rigging requires Harken rod adapter stud.

All Units. Harken toggle (sold separately).

Line not included.
Rod Rigging. Harken rod adapter
stud required (sold separately).

WARNING! A stay that is old or damaged can break suddenly, causing an accident. Headstay condition should be checked by a professional rigger before reusing.

Jaw/jaw toggle w/ short link plate
Unit Part No.

7413.20 3/4 3
7413.20 7/8

7414.20 7/8

4

7414.20 1

7414.20 1 1/8

Long link plate w/toggle Unit Part No.
7313.21 3/4 3
7313.21 7/8

Rod adapter stud

Unit Part No.

3

7426 -22 7427 -30

7427 -30

4

7428 -40

7429 -48

Tools You Will Need

Adhesive Alert

5 3

1 2

4 12

8
10 6

7
1. Long tape measure 2. Short tape measure 3. Power drill 4. Drill bit ­ 4 mm (5/32″) 5. Hacksaw 6

9

11 13

14

6. Side cutters

11. Center punch

7. Rat-tail file

12. Rigging or black tape

8. Hex keys (provided)

13. Scissors

9. Slotted/Phillips screwdrivers 14. Metal straight edge

10. Needle-nose pliers

15. Hammer

MKIV Unit 3 and 4

MKIV furlers are shipped with 3M 5200 adhesive. Use adhesives on dry connectors and foils. Use the special injection system described in the assembly section. Parts may immediately be exposed to rain. Cure is best at 70 F (22 C) with 50% humidity. Do not apply at temperatures below 40 F (5 C) and above 100 F (38 C).

Although adhesive has not cured, it will

remain in place on foil joints whether

they are left on the ground or raised up

15

on boat. Foils can be raised immediately

after assembly and sails are fitted.

Note: A small amount of adhesive may bulge out of injection ports. If possible let system sit for several days before sailing. If adhesive gets on sails, remove using acetone. For faster-curing adhesive, purchase 4200 Fast Cure.

Note: Damaged foils can be repaired. Use a hand-held propane torch to heat joints until foils can be pulled apart.

B A

Luff Length Note offsets above and below sail.

A shorter luff may be required if a halyard restrainer is necessary (page 31) or a toggle or long toggle assembly is used to raise the drum.

If luff of sail is not long enough to put halyard swivel near top of headstay foil, a pendant must be added. See page 29.

J

Tack Setback

K

Note setback for tack shackle and cut sail accordingly.

Luff Tape Size -6 (5 mm or 6/32″)

J – Finished luff tape size: 5.5 mm (0.215″)

K – Luff rope size: 4.8 mm (6/32″, 3/16″)

L

L – Max Ø in sail groove: 6.5 mm (0.26″)

M – Gap in sail groove: 2.4 mm (0.096″)

Luff Tape Length

M

Cut off top of luff tape so it is 450 to 600 mm (18″ to 24″) below head of sail. This allows head to lag behind rest of sail to help flatten it. It will also help the head to roll more smoothly.

C

Note feeder height and extend bottom of luff tape downward so it is below feeder.

This will prevent luff tape from catching in feeder as sail is lowered.

Tack and Head Shackles (Unit 3 Only)

Make sure tack and head shackles fit sail

rings. Minimum inside dimensions of

A

standard head and tack shackles are:

(A) 48 mm (17/8″)

(B) 21 mm (13/16″)

B

Sun Cover

Sun covers may be installed on either side of sail. Be sure to match other

F

sails in the customer’s inventory.

Unit 3 only – long link plate

D

Note: If a long link plate is used, add the following dimensions to feeder, shackle and drum

height (based on whether plate is used full-length or shortened to one of five hole positions).

Do not add to halyard swivel or top terminal dimensions.

19.1 mm (3/4″) Clevis Pin

Add 497 mm to 271 mm (19 9/16″ to 10 11/16″)

E

22.2 mm (7/8″) Clevis Pin

Add 505 mm to 279 mm (19 7/8″ to 11″)

G H

Unit 4 only

I

A

H

F

G

H

I

Unit

A

B

C

D

E

Max Min Max Min Max Min Max Min

3*

75/16″

115/8″

33/8″

93/4″

43/4″ 547/8″ 545/16″ 1811/16″ 181/16″ 1613/16″ 161/2″ 711/16″

71/8″

186 mm 296 mm 86 mm 247 mm 121 mm 1394 mm 1380 mm 474 mm 460 mm 427 mm 413 mm 195 mm 180 mm

4

815/16″ 227 mm

—

—

111/16″

51/8″

533/4″ 547/8″

280 mm 130 mm 1365 mm 1394 mm

—

—

201/4″ 191/8″

87/8″

73/4″

515 mm 486 mm 225 mm 196 mm

*See note above regarding long link plates. **Drum assembly height increased 4″ (100 mm) in 2020; older units will have lower feeder.

MKIV Unit 3 and 4

7

Preassembly

Toggle Deductions/Stay Into Foil Options

Use dimensions of Harken toggle below to build stay to correct length. Tip: Turnbuckles should be 1/2 to 2/3rds open to allow shortening for new wire stretch and for fine-tuning mast rake.

Unit Clevis pin Ø

Pin-to-pin length

19.1 mm (3/4″) 83 mm (3 9/32″)

3

22.2 mm (7/8″)

98 mm (3 7/8″)

19.1 mm (7/8″)

98 mm (3 7/8″)

4

25.4 mm (1″) 115 mm (4 9/16″)

28.57 mm (11/8″) 127 mm (5″)

Unit Clevis pin Ø

Pin-to-pin length

19.1 mm (3/4″) 83 mm (3 9/32″)

3

22.2 mm (7/8″)

98 mm (3 7/8″)

1. Swage stud at end of wire.
2. Open end of wire and install Norseman or STA-LOK® stud after foil is assembled.
3. Rod adapter nosepiece for Harken rod adapter stud: Threaded nosepiece must have a positive lock as well as adhesive. Use Harken stud with cotter pins. See page 22.
WARNING! Using a threaded nosepiece with only adhesive at the upper rod eye terminal may result in headstay system failure. Make sure there is a mechanical lock.
.

Options for Feeding Stay into Foils

8

MKIV Unit 3 and 4

STA-LOK is a registered trademark of Barfield Engineering Company Ltd

Preassembly

Measure A and add to this chart and length chart below

Inches

mm

A

B

1*

25*

E

24

610

F

26.25

667

G

Total A+B+E+F+G

*Add 29 mm (1.12″) if using a halyard deflector.

Unit 3–Top Foil Length

Make sure upper

measurement points

Alternate

A

of A and pin-to-pin

measurement

A

are the same.

point

B

Pin

C

to

pin

TOP FOIL LENGTH WORKSHEET

1

Pin-to-pin length

2

Subtract ABEFG

­

3

Result (pin-to-pin ­ ABEFG)

4

Subtract D

­

D

To find “D”, pick number from chart below that is closest

to, but not greater than total from step 3.

Inches

mm

7 x 84 = 588 8 x 84 = 672 9 x 84 = 756 10 x 84 = 840 11 x 84 = 924

7 x 2133.6 = 14935.2 8 x 2133.6 = 17068.8 9 x 2133.6 = 19202.4 10 x 2133.6 = 21336 11 x 2133.6 = 23470

Example­If result from Step 3 is: 800 inches “D” = 756 inches; 20,000 mm “D” = 19202 mm

5

Result (C) top foil length

UNIT 3

Length Check
After completing worksheet above fill in A, C, D, and G below. Add “A” through “G” to confirm total equals your pin-to-pin measurement.

Length chart
Dimensions
A Center of pin to bottom of terminal B Bottom of terminal to top of foil C Top foil length D Number of foils ____ x 2133.6 mm (84″) E Bottom foil F Bottom of foil to hub extension holes G Hub extension holes to clevis pin
Pin-to-pin length
*Add 29 mm (1.12″) if using a halyard deflector.

Inches

mm

1″*

25*

24″

610

26.25″

667

G: Toggle distance from lower clevis pin to hub extension holes

Toggle part no.

Type

Clevis pin

G distance

7413.20 3/4 Jaw/jaw with short link plate

3/4″ 19.1 mm 5.42″ 138 mm

7313.20 7/8 Jaw/jaw with short link plate

7/8″ 22.2 mm 6.00″ 152 mm

7313.21 3/4 Long link plate w/toggle

3/4″ 19.1 mm 22.00″ 559 mm

7313.21 7/8 Long link plate w/toggle

7/8″ 22.2 mm 22.63″ 575 mm

Note: If long link plate is shortened, dimension must be changed or foil will be too short. Measure distance from hub extension holes down to where clevis pin attaches toggle to boat. Use this dimension in G above.

MKIV Unit 3 and 4

Pin to E in
F
G
9

UNIT 4

Preassembly

Measure A and add to this chart and length chart below

Inches

mm

A

B

1″

25

E

24″

610

F

25.98″

660

G

Total A+B+E+F+G

Unit 4–Top Foil Length

Make sure upper measurement points of A and pin-to-pin measurments are the same.

Alternate measurement
point

TOP FOIL LENGTH WORKSHEET

A
Pin to pin

1

Pin-to-pin length

2

Subtract ABEFG

­

3

Result (pin-to-pin ­ ABEFG)

4

Subtract D

­

To find “D” pick number from chart below that is closest

to, but not greater than total from step 3.

Inches

mm

7 x 84 = 588

7 x 2133.6 = 14935.2

8 x 84 = 672

8 x 2133.6 = 17068.8

9 x 84 = 756

9 x 2133.6 = 19202.4

10 x 84 = 840

10 x 2133.6 = 021336.0

11 x 84 = 924 12 x 84 = 1008

11 x 2133.6 = 023470.0 12 x 2133.6 = 025603.0

Example­If result from step 3 is: 800 inches “D” = 756 inches 20,000 mm “D” = 19202 mm

5

Result (C) top foil length

A B
C
D
E Pin to pin

Length Check
After completing worksheet above fill in A, C, D, and G below. Add “A” through “G” to confirm total equals your pin-to-pin measurement.

Length Chart

Dimensions

Inches

mm

A Center of pin to bottom of terminal

B Bottom of terminal to top of foil

1″

25

C Top foil length

F

D Number of foils ____ x 84″ (2133.6 mm)

E Bottom foil

24″

610

F Bottom of foil to hub extension holes

25.98″

660

G Hub extension holes to clevis pin

Pin-to-pin length

G Toggle Distance from Lower Clevis Pin to Hub Extension Holes

Toggle part no.

Type

Clevis pin

G distance

7414.20 7/8

Jaw/jaw with short link plate

7/8″

22.2 mm

5.95 151 mm

7414.20 1

Jaw/jaw with short link plate

1″

25.4 mm

6.64 169 mm

G

7414.20 1 1/8 Jaw/jaw with short link plate

11/8″ 28.57 mm 7.01 180 mm

10

MKIV Unit 3 and 4

Preassembly

Unit 3–Short Top Foil

If top foil is shorter than 248 mm (9 3/4″), use one of the following techniques to ensure sufficient bearing surface for the foil in the area of the halyard swivel.

89 mm (3 1/2″) 76 mm (3″) 64 mm (2 1/2″) 51 mm (2″) 38 mm (1 1/2″)

248 mm (9 3/4″)

UNIT 3
178 ­ 140 mm (7″ ­ 51/2″)

244 ­ 181 mm (9 5/8″­7 1/8″)

248 mm (9 3/4″) No special treatment required.
Cut-offs Do not use 244 ­ 181 mm (9 5/8″ ­ 7 1/8″) Do not use plastic bushing above top connector.

Cut-offs Do not use
89 ­ 38 mm (3 1/2″ ­ 1 1/2″) Shorten top foil and adjoining full length foil so two (2) screws are used to assemble joint instead of four (4). Do not use plastic bushings above top connector.

Top foil length from worksheet
3 1/2″ (89 mm)
3″ (76 mm)
2 1/2″ (64 mm)
2″ (51 mm)
1 1/2″ (38 mm)

1. Initial top foil cut length
6 9/16″ (167 mm)
6 1/16″ (154 mm)
6 9/16″ (167 mm)
5 1/16″ (129 mm)
4 9/16″ (116 mm)

2. Cut through middle hole in
top foil.*
Resulting top foil length
5″ (127 mm)
41/2″ (114 mm)
4″ (102 mm)
31/2″ (89 mm)
3″ (76 mm)

3. Shorten full length
adjoining foil by cutting through middle hole.*

4. Shorten connector
Length 4 7/8″ (124 mm) 4 7/8″ (124 mm) 4 7/8″ (124 mm) 4 3/8″ (111 mm) 3 3/4″ (95 mm)

5. Shorten trim cap
No No No Yes Yes

Cut-offs Do not use
178 ­ 140 mm (7″ ­ 5 1/2″) Do not use plastic bushing above top connector. Shorten top of connector and, if necessary, shorten trim cap.

Cut-off Do not use
*To allow for saw cut, position blade so upper half of middle hole is preserved.

Under 38 mm (1 1/2″)

137 ­ 102 mm (5 3/8″ ­ 4″)

Cut-offs ­ Do not use

137 ­ 102 mm (5 3/8″ ­ 4″) Do not use plastic bushing above top connector. Cut connector at cross formed by glue dispersion channels. Use single foil screw in top foil only.

Under 38 mm (1 1/2″) Eliminate top foil and run foil higher in drum assembly.

MKIV Unit 3 and 4

11

Preassembly

Unit 4–Short Top Foil

If top foil is shorter than 260 mm (10 1/4″), use one of the following special techniques to ensure sufficient bearing surface for the foil in the area of the halyard swivel.

102 mm (4″) 89 mm (3 1/2″)
76 mm (3″) 64 mm (2 1/2″)
51 mm (2″) 38 mm (1 1/2″)

260 mm (10 1/4″)

UNIT 4
190 ­ 168 mm (7 1/2″ – 6 5/8″)

260 mm (10 1/4″) No special treatment required.

Cut-offs ­ Do not use.
102 ­ 38 mm (4″ ­ 11/2″) Shorten top foil and adjoining full length foil so two screws are used to assemble joint instead of four. Do not use plastic bushings above top connector.

258 ­ 192 mm (10 1/8″ ­ 7 9/16″)

Cut-Offs ­ Do Not Use. 258 ­ 192 mm (10 1/8″ ­ 7 9/16″) Do not use plastic bushing above top connector.
Cut-Offs ­ Do Not Use.

Top Foil Length from Worksheet
4″ (102 mm)
3 1/2″ (89 mm)
3″ (76 mm)
2 1/2″ (64 mm)
2″ (51 mm)
1 1/2″ (51 mm)

1. Initial top foil cut length

2. Cut through middle hole in top foil.*

Resulting Top Foil Length

9 3/32″ (231 mm)

6 17/32″ (166 mm)

8 19/32″ (218 mm)

6 1/32″ (153 mm)

8 3/32″ (205 mm)

5 17/32″ (140 mm)

7 19/32″ (193 mm)

5 1/32″ (128 mm)

7 3/32″ (180 mm)

4 17/32″ (115 mm)

6 9/16″ (167 mm)

4 1/32″ (103 mm)

3. Shorten full length adjoining foil by cutting through middle hole.*

4. Shorten connector
Length 5 11/32″
(136 mm) 5 11/32″
(136 mm) 5 11/32″
(136 mm) 5 11/32″
(136 mm) 5 5/32″
(131 mm) 4 1/2″
(114 mm)

5. Shorten trim cap
No No No No No Yes

190 ­ 168 mm (71/2″ ­ 6 5/8″) Do not use plastic bushing above top connector. Shorten top of connector and if necessary shorten trim cap.

Cut-Off Do Not Use

*To allow for saw cut, position blade so upper half of middle hole is preserved.

Under 38 mm (11/2″)

165­111 mm (16 1/2″­4 3/8″)

Cut-Offs ­ Do Not Use.

165 ­ 111 mm (6 1/2″ ­ 4 3/8″) Do not use plastic bushing above top connector. Cut connector right at cross formed by glue dispersion channels. Use single foil screw in top foil only.

Under 38 mm (1 1/2″) Eliminate top foil and run foil higher in drum assembly.

12

MKIV Unit 3 and 4

Preassembly
Confirm foil length by laying foils alongside stay with turnbuckle components. Pull stay out so it is straight. Attach Harken toggle to bottom of stay. Make sure toggle straps are straight. Adjust turnbuckle so that length of stay with Harken toggle will fit boat. Turnbuckle should be one-half to two-thirds open to allow for rig adjustment. Line up drum assembly so holes below drum line up with holes in Harken toggle. Make sure toggle is tensioned when measuring.
Line up bottom foil so foil clamp is centered or just below center of notches in bottom foil.

Confirm Foil Length

Note: Position top foil so that including top cap, the foil will ride 25 mm (1″) below terminal. If wire fitting at top of stay is swage, foil must ride just below shoulder of swage. Mark cut line on foil. Wrap tape around foil as a guide so cut is straight.

Unit 4

MKIV Unit 3 and 4

Unit 3 only. If 7304 halyard deflector is
used, add 25 mm (1″).
13

Assembly
Cut foil to length using hacksaw.

Top Foil

Deburr inside edge using rat-tail file.

Prepare top foil for drilling.
Tip: Mark top foil to distinguish from cut-off piece.
Scribe line on top of foil to mark drill holes. Lay top foil alongside cut-off piece and use a flat metal object (i.e. metal ruler) to scribe top line of foil.

14

MKIV Unit 3 and 4

Assembly
Cut out template at right. Line up template with top of foil and scribed line. Tape in place. Use center punch to mark holes. Check center punch marks to confirm they are 10 mm (3/8″) and 35 mm (1 3/8″) from top of foil.
Drill two (2) 4 mm (5/32″) holes for trim cap.

Top Foil

Foil top

10 mm (3/8″) Unit 3, 4 template

35 mm (13/8″)

Lay top foil in line with others. Slide stay into top foil and down line of foils, or slide each foil up stay.

MKIV Unit 3 and 4

15

Assembly

Install trim cap. Place each side over wire.
Unit 3 only. Halyard deflector.
Red Loctite® adhesive.
Push trim cap into foil to start; tap in using hammer. Install trim cap screws.

Top Foil

Place halves of plastic bushings on stay so hooked part of longer section faces out.
Tip: With foil screw holes up as shown below, place longer half of bushing with hook on upper half.

16

MKIV Unit 3 and 4

Loctite is a registered trademark of Henkel AG & Company KGaA.

Assembly
Slip connector on wire, mating hook of plastic bushing with connector.

Top Foil/Connectors

Put a drop of red Loctite® adhesive into screw holes.

Loctite is a registered trademark of Henkel AG & Company KGaA.

MKIV Unit 3 and 4

17

Assembly
Hold plastic wedge in place with thumb as you insert into foil. Line foil holes with connector screw holes.

Foils/Connectors

Tip: In cooler weather, keep sealed adhesive in pocket to keep it warm. Use instructions below to fill injector less than half way; you will only use a small amount of adhesive. Refill if needed but do not keep open sealant for long periods. Use adhesive within three (3) hours. Use cap of adhesive to break seal. Remove injector tip cap and plunger. Hold injector at an angle with applicator tip facing down. Squeeze adhesive into tube so lower half of injector is full as shown. Keep tip free of sealant to let air inside.
Start plunger into injector and immediately hold upright so plunger is down and applicator tip is up. As sealant runs down toward plunger, an air pocket will form near tip. Push plunger to evacuate air. You are now ready to begin injecting adhesive.

Adhesive in lower half

Loading Injector with Adhesive

18

MKIV Unit 3 and 4

Assembly

Inject only a small amount of adhesive into middle hole.

Unit

Adhesive

3

1 to 11/4 ml

4

11/4 to 11/2 ml

Tip: When you see a small amount

of adhesive enter one screw hole,

stop! You have applied

enough adhesive.

Stop when you see a small amount of adhesive enter one screw hole.

Tighten screws into connector holes. Make sure a drop of adhesive entered each screw hole. If not, apply to screw.

Foils/Connectors
Use “ml” marks to estimate 1 to 11/4 ml of adhesive.

Use bushings, connector, wedge and adhesive in other screw hole and insert into other foil. Use 1­11/4 ml of adhesive.

Red Loctite®adhesive.

Loctite is a registered trademark of Henkel AG & Company KGaA.

MKIV Unit 3 and 4

19

Assembly
Continue installing connectors and wedges. Make sure to use adhesive in screw holes.

Bottom Foil/Connectors/Halyard Swivel

Red Loctite® adhesive.
Continue assembly. Use 356 mm (14″) bottom connector to assemble bottom foil.

Slide halyard swivel onto foil above feeder window. Make sure taller “half” is up as shown.

20

MKIV Unit 3 and 4

Loctite is a registered trademark of Henkel AG & Company KGaA.

Assembly
Loosen foil clamp screws at top of drum assembly.
Slide drum assembly onto foils. Tip: Face clamp downward so it clears foil notches during installation.

Drum Assembly

MKIV Unit 3 and 4

21

ROD RIGGING

Assembly
Apply a few drops of red Loctite® adhesive to threads of nosepiece.
Screw main threaded stud portion onto bronze nosepiece until flats align with two cotter pin holes in terminal body.
Tip: Turn nosepiece completely into threaded stud portion. Flats will be close and may only require a small half turn to align with cotter pin holes.

Rod Adapter Stud

Insert two cotter pins and spread. Clean excess Loctite from terminal body using special care to ensure that there is no red Loctite on threaded stud.

22

MKIV Unit 3 and 4

Loctite is a registered trademark of Henkel AG & Company KGaA.

Assembly
Assemble turnbuckle. Note: If using STA-LOK® or Norseman stud, you must use a washer above stud as shown below.
STA-LOK is a registered trademark of Barfield Engineering Company Ltd.

Washer

Connect eye to toggle jaw using special clevis pin. Secure using cotter pin.
Make sure shallow jaw is up. Up

Down
If stay length is set, use side cutters or needle-nose pliers to bend cotter pin to secure turnbuckle.

Attach Turnbuckle/Toggle

MKIV Unit 3 and 4

23

Assembly
Apply isolator.

Unit 3, 4–Attach Toggle/Short Link Plate

Recess turnbuckle into drum assembly, slip link plates over special clevis pin, and secure using fasteners. Use blue Loctite® adhesive on screws.
Loctite is a registered trademark of Henkel AG & Company KGaA.
Secure to toggle using lock nuts.

24

MKIV Unit 3 and 4

Determine height of link plates to provide anchor clearance and cut to length. Cut at scribe mark. Deburr edges.
Apply isolator. Fasten one long link plate to drum assembly using fasteners. Use blue Loctite® adhesive on screws.

Fasten second long link plate to drum assembly and secure to toggle using locknuts.
WARNING! Stay must attach to toggle. Do not attach stay to crosspin at drum assembly because crosspin and plates can fatigue and break.

Loctite is a registered trademark of Henkel AG & Company KGaA.

MKIV Unit 3 and 4

25

Assembly
Check foil height at top; set and secure using hex key.
Slide halyard swivel above feeder. Place feeder in foil recess. Push screw down so tab catches under foil. Tighten screw. Note: Screw will turn with some difficulty. It is plastic-coated to prevent loosening due to vibration. IMPORTANT! When removing screw, loosen no more than one full turn. Slide screw up and remove feeder.

Feeder/Final

26

MKIV Unit 3 and 4

Commissioning–Unit 3, 4
Have extra cotter pins and locknuts on hand to replace used ones at base of unit and for turnbuckle. Hold foils and loosen drum assembly screws until you can pull clamp out to lower foils. Lower foils. Remove link plates. Raise drum assembly and use halyard to lift and hold it about 1.5 m (5′). Raise foils using second halyard and secure. Allow room above for turnbuckle take up.
WARNING! Make sure drum assembly and foils are securely lifted with a halyard before adjusting turnbuckle. Foils can drop suddenly, causing injury to hands.
Adjust turnbuckle. Replace used cotter pins and locknuts. Lower drum assembly and install clevis pin and new cotter pin. Lift foils so top is 25 mm (1″) below upper terminal.

Turnbuckle on Boat

MKIV Unit 3 and 4

27

Commissioning–Unit 3, 4

Leading Line to Cockpit
Run line through enclosed window in guard and into hole in bottom flange of spool. Tie a small overhand knot and pull it up under drum assembly.

WARNING! Lead line through enclosed window. If line is led through opening between two enclosed windows, it can ride above line guard and jam furler which can cause loss of control of boat.
Enclosed window
Note location of sun cover. With no sail on unit, charge system by rotating furler to wrap line on drum. Leave a comfortable-length line tail in cockpit. Fine-tune line length on all points of sail after sail is hoisted and set.

Tip: Sun cover to starboard–turn clockwise to charge. Sun cover to port–turn counter clockwise. Tension line while charging.

Mount lead blocks

Furling line can be led down either side of boat. If boat is in slip, consider mounting

opposite dock.

2660 Forward Lead Block
BOW
Position 2660 forward stanchion block so line

enters drum at right angles to headstay and

centers vertically in opening. Install so line

2660 Carbo

is inside stanchion.

forward lead block

Correct block position is critical to even line spooling and ease of furling.

Furling line must enter drum at right angle to headstay.

2600 Carbo intermediate
lead block
2600 Carbo intermediate
lead block

2600 57 mm Carbo Intermediate Lead Blocks
Install 2600 intermediate lead blocks so line is inside stanchions.
Number and placement of leads depends on boat length and number/configuration of stanchions.
2670 75 mm Carbo® Ratchet Block
Mount 2670 Carbo® Ratchet block as furthestaft lead to prevent line overrides in drum when unfurling. Position ratchet block so line turns at least 90°.

Furling line lead changes as amount of furling line on drum changes.

Install so line is inside stanchion.

2600 Carbo intermediate
lead block
2670 Carbo Ratchet block

Lead line through block so ratchet makes clicking sound when pulling line to furl sail.
Tip: Make sure ratchet switch is in “on” position. If there is no clicking sound, lead line through block in opposite direction.
Lead line to furling line cleat in cockpit.
Furling Line Cleat
Install so line is angled as shown.

Drum Full (sail unfurled)
Drum Empty (sail furled)

Note: As furling line lead changes, make sure line

doesn’t chafe against line guard. Rotate line guard

Stern

if necessary.

28

MKIV Unit 3 and 4

Halyard Wraps The most serious problem with furling systems occurs when the jib halyard wraps around the headstay foil. Halyard wraps will keep you from furling or unfurling and may cause serious damage to the unit and the halyard.
WARNING! In severe cases, a halyard wrap can cause loss of control of boat and/or headstay can break suddenly. Make sure halyard is clear of top foil before using system.
If Halyard Wraps If halyard wraps, do not force unit to turn. Attempt to open sail by carefully furling in and out a little at a time. If sail unfurls, lower it by releasing jib halyard. Severe halyard wraps can only be cleared by a professional going aloft and freeing halyard.
If sail will not furl or unfurl, try to remove jib sheets and manually wrap sail around headstay.

WARNING! Do not go aloft on boat’s halyards if there has been a halyard wrap. Do not use boat. Damage to halyard, headstay, stay terminals, or connections as a result of a halyard wrap can cause these parts to break suddenly, causing the mast to fall while person is aloft. Sailing or motoring with boat after a wrap can result in the headstay breaking and mast falling. Before using boat, have a professional rigger inspect and replace parts as necessary using following methods.
A professional rigger must carefully inspect the masthead area using a secure hoisting method. Inform rigger that there has been a halyard wrap so he can avoid an accident by relying on standing rigging or halyards. Inspection must be done while rigger is suspended from a separate crane, or mast must be lowered to perform inspection. Some professionals may rig a new line through internal masthead sheaves to serve as a temporary headstay to hold mast in place. Wire, rod rigging, terminals, toggles, clevis pins or cotter pins must be inspected and replaced if they show any signs of damage.

Prevent Halyard Wraps To prevent wraps, the halyard must exert a slight pull to the rear. This allows the foils to turn while halyard remains stationary.

WARNING! Sail must be fitted to foil length before using to prevent halyard wraps and possible headstay loss.
1. Halyard swivel should be within top 100 ­ 152 mm (4 ­ 6″) of foil unless a halyard restrainer is used.
2. Halyard must pull slightly to rear (8 ­ 10°).
3. Halyard must be snug, but not too tight.
Test furler at dock. However, if water is smooth, an incorrect lead angle may not be apparent. Halyard wraps usually occur in wave action when lead angle is not correct. The 8 ­ 10° angle shown at right is critical.

8 ­ 10°

MKIV Unit 3 and 4

29

Commissioning–Unit 3, 4

Pendant/Halyard Restrainer/Halyard Tension

Pendants
If the your sail luff is not long enough to position halyard swivel high enough to create an 8 ­ 10° angle as shown, you must add a pendant. Pendants should be made of plastic-coated wire and be permanently attached so sail height will be correct. Adjustable-length pendants are not acceptable, as they might not be adjusted correctly during a sail change.
1. Raise sail, but do not attach tack shackle. 2. Position halyard swivel correctly near top of headstay. 3. Secure halyard. 4. Tie a piece of rope to sail tack. 5. Lead line through tack shackle on furling drum. 6. Tension sail. 7. Measure distance from tack shackle to sail tack and permanently
attach pendant of this length to head of sail. 8. Repeat procedure for every jib in your sail inventory.

Halyard Deflector/Halyard Restrainer To prevent wraps, jib halyard must pull slightly to rear. On most boats, halyard lead angle is acceptable if halyard swivel is raised to top of foil.
On some boats halyard sheaves are located too close to headstay and a halyard deflector or halyard restrainer must be used.
Halyard restrainers should be used only when required by masthead geometry. Restrainers tend to limit sail luff length, and can cause problems if not installed properly.
If your boat needs a halyard deflector (Unit 3 only), use part no. 7304 or a halyard restrainer (Unit 3 only), use part no. 945.
Restrainer should be mounted as high as possible on face of mast. Position restrainer so that foils will not hit it when under load.
The restrainer should deflect halyard as little as possible or you might experience difficulty in tensioning sail luff, have friction when furling, and cause possible damage to foils. To decrease deflection angles, shorten sail luff.
Tip: Boats used in charter service should have a halyard restrainer, regardless of masthead geometry.
Halyard Tension The jib halyard should be firm, but not too tight.
Tip: The luff foil system supports sail along its length so halyard tension is used only to shape sails, not to support them. Use enough halyard tension to remove some wrinkles along luff of sail. Do not tension halyard enough to cause vertical wrinkles in luff of sail. Tension to adjust position of draft in sail to suit sailing conditions. Halyard should be firm, but not tight. If in doubt, release halyard tension. To protect sail, ease halyard when boat is not in use.

Unit 3 only

Unit 3 only

Halyard deflector
Unit 3 or
Unit 4

Halyard restrainer

30

MKIV Unit 3 and 4

Lash halyard, head of sail, and tack. A triple fisherman’s knot is useful for this purpose. See www.harken.com/knottyingresources.

MKIV Unit 3 and 4

31

Operation

Spinnaker Halyards/Headstay Tension/Backstay Adjuster
Spinnaker Halyards Spinnaker halyards occasionally cause problems with furling.
WARNING! In severe cases, spinnaker halyards can jam furler, causing loss of control of boat. Make sure halyards are clear of top of foils and halyard swivel.
On many boats, it is not possible to attach spinnaker halyard to bow pulpit or it may be “sucked” into jib when furling.
On some boats the spinnaker halyard lays across headstay and will catch on halyard swivel, foils, or jib halyard. To prevent problems, it may be necessary to install a masthead bail to move spinnaker halyard block forward and to one side.
Boats with external halyards might find it necessary to flip both ends of spinnaker halyard behind spreaders to prevent fouling with furling system.
Headstay Tension A furling system will work best if headstay is tight.
A loose headstay is difficult to rotate and can cause unusual wear on foil joints.
To adjust headstay tension, remove sail and furling line from unit and follow instructions on page 27.
Tip: Before adjusting headstay tension, slack mainsheet and vang.

Backstay Adjusters Backstay adjusters allow headstay tension to vary so sail shape can be changed to match conditions. They permit a very tight headstay to be eased when boat is not in use. For best performance, consider adding a backstay adjuster; either a block and tackle, or a mechanical, or hydraulic adjuster like those offered by Harken.
Remember to keep headstay tight for best performance when furling or reefing.
If your boat is fitted with an adjuster be sure that it is tensioned before the halyard is tensioned. If not, backstay adjuster may increase halyard tension and could damage the sail or furling system.
Racing boats often slack the headstay completely when sailing downwind. Check to be sure that foil does not jam against upper headstay terminal when backstay is released. To prevent this, it might be necessary to shorten foil slightly.

32

MKIV Unit 3 and 4

Raise Sails 1) Install prefeeder by securely tying end of line to a deck fitting or to toggle
below furler so it is 610 mm (2′) below feeder.
2) Shackle tack of sail to drum. Install shackle so screw-pin head is on same side as sun cover.
3) Secure genoa sheets to clew of sail.
4) Attach genoa halyard to halyard swivel.
5) Pass luff tape through prefeeder and feeder into foil groove.
6) Attach head of sail or pendant at head of sail to halyard swivel.
7) Hoist sail.
8) Furl sail to check for possible halyard wraps. See pages 29 – 30.
9) See if sail will furl completely and still leave two wraps of line on spool and two wraps of sheets around sail. See “Secure Sail” on page 36.
Tip: New sails are often stiff and may hang up on prefeeder during raising. Do not force sail when it hangs up. Lower and remove twist. Sails “break in” with use and will become easier to raise.

Storm Sails Most people will use one multi-purpose genoa for all their sailing, but it is not good seamanship to go offshore without storm sails.
Heavy-air working jibs and storm sails should be used with your unit. These sails need to have luff tape added to allow them to be raised in headstay foils.
These sails will generally require pendants to ensure that halyard swivel is properly positioned at top of headstay. See page 29.
Remember that heavy-air working jibs and storm jibs may be reefed and furled like any other sail.

Furl and Reef To furl or reef, ease the jib sheets and pull furling line.
In very light air, it might be necessary to place some tension on jib sheet to insure a tight furl.
To furl in a breeze, ease sheets gradually and pull furling line in steps until sail is furled or reefed.
The furling line should pull readily. Depending upon wind strength, larger furlers may require use of a winch to furl. If sail will not furl, or if furling requires a great deal of effort, there is a problem with system. Consult the Troubleshooting Guide on page 39. Do not use a winch to force a system to turn. If you are certain that the system is operating properly, you may use a winch to make furling easier.

WARNING! Using a winch to furl when the halyard is wrapped may cause the headstay to fail, resulting in an accident.

MKIV Unit 3 and 4

33

Operation
Reef A sail may be partially furled before you resume sailing. This is known as reefing.
Many sailors find it helpful to place marks on foot of sail so they can reef to a variety of predetermined jib sizes. This allows marks to be placed on jib lead tracks or toe rail so that lead block position can be changed to correspond to reefed jib.
Sails are generally reefed to balance the boat and to reduce heeling moment. Sails can also be reefed to improve visibility, or to slow boat while sailing in congested areas such as entering or leaving harbors.

Reef/Secure Sail

Secure Sail When furling the sail completely, make sure sheets and furling line are secured. Check amount of line on the spool compared to the furled sail before using the system.
A furled sail must have:
a. Two to three wraps of the jib sheet around sail.
b. Two wraps minimum of line wound on spool.
c. Furling line securely cleated.
d. Jib sheets securely wrapped on winch and held in self-tailing jaws.
Furl at dock with tension on sheets to duplicate furling in high wind.
Remember sails furled in light wind and left loosely secured can be a problem if wind increases.
IMPORTANT! Remove sail from furler if extreme winds are predicted, especially if boat is left unattended.
IMPORTANT! Check all points above–a, b, c, and d–when leaving boat to avoid damage to furler or boat.
A loosely rolled sail can catch wind in a storm. Sheets or furling lines can loosen as winds increase and allow furler to unroll. If there are no line wraps on spool, the line deadend can break the drum when the boat motors through waves.
Be sure mooring lines are not placed across furling line where they may cause chafe.

a. 2 ­ 3 wraps

If you want to: Add more wraps of jib sheet on furled sail. Add more wraps of line on spool.
34

Untie jib sheets and keep sail completely rolled. Secure with sail tie.

Turn spool to unroll a several of wraps of line. Turn spool to add a several of line.
MKIV Unit 3 and 4

Retie sheets.

B. 2 ­ 3 wraps

Operation
Race conversion allows use of both grooves for sail changes and tacking genoas on deck for use of maximum luff length genoas.

Remove Feeder

Race Conversion

Halyard Swivel Below Feeder
Use halyard to lift halyard swivel up, and away from feeder. Loosen screw one revolution only. Slide screw up and hold. Remove feeder carefully–bottom end first. Don’t lose the feeder overboard! Lower swivel onto drum assembly. Replace feeder.

Halyard Swivel Off Furler
Serious racers may want to remove the halyard swivel.
Note: It is not possible to remove halyard swivel on a unit with a Norseman /Sta-Lok® or rod adapter stud unless you disassemble terminal stud. Make sure you use a new Norseman/STA-LOK® wedge to reassemble Norseman/STA-LOK® fitting.

1. Remove drum assembly. 2) Rig a secure, temporary headstay. 3) Loosen backstay, mainsheet, and vang
   so headstay goes slack. 4) Remove clevis pin holding furling unit
   to chainplate. 5) See adjusting turnbuckle on page 27.
   Remove turnbuckle body and lower unit and slide off halyard swivel. 6) Reattach headstay to boat.

Loosen screw one revolution only.
To Remove Feeder For
Racing

Slide screw up and hold.

2. 1. Loosen screw one revolution only. 2. Slide screw up. Remove feeder. 3. Lower halyard swivel.

Carefully remove feeder-bottom end first. Don’t drop the feeder overboard!

Remove Drum

1. Remove sail and unwind line from drum. Line can remain attached to drum.
2. Use 10 mm Allen wrench provided to remove two (2) screws on bottom of guard assembly. Remove two halves. Be careful–screws are not captive.
3. Use an Allen wrench to loosen four (4) screws in plastic cover and flange.

STA-LOK is a registered trademark of Barfield Engineering Company Ltd.

MKIV Unit 3 and 4

35

Maintenance

Clean/Inspect/Replace Line/Remove Furler
Clean and Lubricate Keep unit clean. When you wash boat, flush unit with soap and fresh water. Occasionally lower sail and flush halyard swivel with soap and fresh water.
At least twice a year unit should be cleaned more thoroughly by removing line (first note direction of spool) and flushing bearings with soap and fresh water. After unit has dried, apply a dry spray lubricant such as McLube.
Foils can be cleaned by washing with soap and water. A scrap of luff tape may be run up foil to scrub inside grooves. If lubrication is required, spray a thin coat of McLube® SailKoteTM dry lubricant on sail luff tapes away from boat deck.
WARNING! Do not spray foil on boat. McLube will cause slippery decks which can result in loss of footing, and falling overboard.

WARNING! Periodically inspect items listed below and any others as necessary. Failure to inspect can cause an accident.
Inspect Inspect unit for signs of chafe, wear, or damage.
Inspect clevis and cotter pins below and inside drum assembly for signs of loosening. Check headstay tension for signs of loosening.
Inspect swage fitting and lower toggle for signs of stress corrosion.
Inspect Norseman or STA-LOK® terminal or rod terminal for signs of loosening.
Inspect all screws on unit to be sure they have not loosened.
Inspect foil to make sure that it has not dropped into drum assembly. Periodically inspect wire for signs of wear or unraveling. Replace Line Use 11 mm (7/16″) diameter line. Use double-braid polyester line with good wear characteristics.
Storage ­ Mast Down In areas where it freezes, do not store system where water can accumulate in foils. When water freezes it will rupture aluminum. Store foils under cover, with grooves facing down or on an angle so water will run out.
Storage/Transporting Do not store or transport system with drum assembly extending beyond mast. Remove masthead clevis pin and shift furler up so drum assembly can be strapped securely to mast. Some people remove drum assembly and halyard swivel for storage and transport.
After Storage or Transport After storing or transporting unit, clean thoroughly including ball bearings. See instructions above.
Loosen Foil Clamp Before Slacking Backstay In order to prevent foils from locking against upper stay terminal when backstay is released, loosen foil clamp screws and lower foil before loosening backstay.

STA-LOK is a registered trademark of Barfield Engineering Company Ltd. SailKote is a trademark of McLube®, a division of McGee Industries McLube is a registered trademark of McGee® Industries, Inc.
36

MKIV Unit 3 and 4

Troubleshoot

Problem
Sail will not furl or is difficult to furl.

Probable Cause
Jib halyard is wrapping around headstay because angle between mast and and halyard is too shallow Jib halyard is wrapping around the headstay because halyard swivel is too low. Jib halyard is too tight. Foils riding on turnbuckle. Foils too high, binding on swage eye. Spare halyard is wrapping in sail as it furls. Salt or dirt in bearings. Furling line tangled in drum.

Sail will not unfurl or will not unfurl completely.
Sail will not furl completely.

Stop knot catching. Sail full of wind. Sail flogging too much. Jib sheets are not free. Foil out of drum assembly. No wraps of furling line on drum. Line guard assembly has slipped down. Line through 2670 ratchet backwards. Halyard swivel installed upside down. Jib halyard wraps around headstay because angle between mast and halyard is too shallow. Jib halyard is wraps around the headstay because the halyard swivel is too low. Foils riding on turnbuckle. Foils too high, binding on swage eye. Jib halyard is too tight. Spare halyard wraps in sail as it furls. Salt or dirt in bearings. Furling line is not free. Insufficient furling line on drum. Too much line on drum.

Headstay rotates in jerks or elliptically.
Sail does not stay furled.
Sail will not go up.

Spare halyard catching in sail as it furls. Insufficient tension on headstay.
Sail not furled tightly on stay. Furling line not secure. Luff tape will not go into groove.

Sail will not raise completely or luff will not tension.
Sail will not come down.
Ultravoilet cover rolls up inside of sail.
Line jams between guard and plastic spool plate.

Sail catching at prefeeder. Dirt in groove. Halyard swivel is hitting end stop. Angle between halyard and mast is too sharp and halyard is pulling too much to the rear. Halyard is wrapping on headstay.
Halyard swivel off foil. Furling line is wrapped on drum in wrong direction.
Line is not led through windows.

Solution
See installation instructions regarding optimal halyard angle. It may be necessary to mount a halyard restrainer on front of your mast to hold halyard to rear. See installation instructions regarding optimal halyard swivel height. A wire pendant may be needed at head of sail to raise halyard swivel to proper height. Ease jib halyard. Raise foils. See adjusting turnbuckle on page 27. Lower foils until clear. See adjusting turnbuckle on page 27. Secure spare halyards away from furling headstay by flipping them behind spreaders Flush bearings frequently with fresh water and a detergent solution. Overrides are best prevented by using a 2670 ratchet block as the last furling line lead to maintain proper drag on line while unfurling. Make sure knot is a single overhand and is pushed up inside drum. Luff completely before furling or reefing. Release a short length of sheet; pull some furling line and repeat. Free jib sheets. Reinstall foil in drum assembly and tighten clamp screws. Remove sheets. Rotate stay; wrap as much furling line on drum as possible. Tighten line guard assembly screws securely. Rerun line. Remount swivel correctly. See installation instructions regarding optimal halyard angle. It may be necessary to mount a halyard restrainer on front of your mast to hold halyard to rear. See installation instructions regarding optimal halyard angle.
Raise foils. See adjusting turnbuckle on page 27. Lower foils. See adjusting turnbuckle on page 27. Ease jib halyard. Secure spare halyards away from furling headstay by flipping them behind spreaders. Flush bearings frequently with fresh water and a detergent solution. Free furling line. Remove sheets. Rotate stay; wrap as much furling line on drum as possible. Adjust amount of line on drum or change position of forward lead block to allow line to roll evenly on drum. Move halyards away from furling headsail as above. Tighten headstay and/or backstay to eliminate sag in headstay.
Maintain drag on sheets while furling. Secure furling line. Check luff tape for fraying. Check luff tape size. Flake sail more loosely on deck. Clean groove. Luff of sail is too long and must be recut. Halyard must be routed from a point higher on mast. This may require that any halyard turning blocks aloft be replaced or sail shortened. Angle between headstay and halyard is too shallow and must be optimized per installation instructions. Sail luff too long or foil is too short or low and must be lengthened or raised. Remove sheets. Pull line to remove all furling line from drum. Turn stay to rewind line on drum in opposite direction. Line guard and cowling alignment may need to be adjusted. Pull line through enclosed window.

Warranty www.harken.com/manuals or call, write, email, or fax Harken, Inc.,
Pewaukee, WI USA

MKIV Unit 3 and 4

37

MKIV Unit 3 ­ Units Built After February 2009

Parts List

HFS1091 H-45412 HFS1060 H-45413
H-45562 HFS1168 HFS1107 H-45264

Description
1 Top cover Top cover screw (M5 X 16 mm FH) Bottom flange Bottom flange screw (M5 X 12 mm FH)
1 2 Guard Guard screw (M10 X 65 mm FH) 3 Clamp Clamp screw (M8 X 25mm FH) 4 Hub assembly Ball plugs Torlon® ball bearing (1/2″) Delrin® ball bearing (1/2″)
2
UNIT
3

Order 2 2 2 2 2 2 1 4 1 5 25 100

Part No. H-45412 HFS1091 H-45413 HFS1060 H-45562 HFS1168 H-45264 HFS1107 7413.10BASE H-38168 MP-128 MP-116

3

7413.10BASE

8 2 7
38

4

5 6

3

1

7413.20 3/4 7414.20 7/78 413.20 3/4
7413.20 7/8

No. Description

Clevis Pin

5 Jaw/jaw toggle with short link plates 1 Toggle 2 Plates

3 Crosspin

4 Clevis pin (3/4″ X 1.766:GR 302SS)

4

Grip

Length

5 Isolator 6 Cotter pin (5/32″ X 1.250 18-8) 7 Nylon locking nut 8 Socket head cap screw

Clevis pin measurements are “Grip Length.”

Jaw/jaw toggle with short link plates 1 Toggle 2 Plates

3 Crosspin

MP-128 H-38168 MP-116 H-38168 MP-116 H-38168 H-38168 MP-116 H-38168 MP-116

4 Clevis pin (7/8″ X 1.958″ 302SS)

2

3

5 Isolator 6 Cotter pin (5/32″ X 1.250 18-8)

7426 -22 7427 -30

7 Nylon locking nut 8 Socket head cap screw

1

6

No. Description

6 Rod adapter stud (-22) w/nosepiece 1 Stud (main body)

2 Nosepiece -22

3 Cotter pin (3/32 x 1.750)

4 Stud cap 7/8″ ID

8

8

Rod adapter stud (-30) w/nosepiece

85 8

1 Stud (main body) 2 Nosepiece -30 3 Cotter pin (3/32 x 1.750)

4 Stud cap 7/8″ ID

Order 1 1 2 1 1 2 2 2 4 1 1 2 1 1 2 2 2 4

Part No. 7413.20 3/4 H-41489 H-45334 H-42583 H-42403 H-42585 HFS203 HFS991 HFS903 7413.20 7/8 H-42562 H-45334 H-42584 H-42404 H-42585 HFS203 HFS991 HFS903

Order 1 1 1 2 1 1 1 1 2 1

Part No. 7426 -22 H-41812 H-41811 HFG319 HFG303 7427 -30 H-41814 H-41813 HFG319 HFG303

8 2
7 4 6

No. Description

8 2

Long link plate w/toggle

7 7 2

1 Toggle

2 Plates

7

5

6

3 Upper clevis pin (custom) 4 Lower clevis pin

1

5 Isolator

7

6

6 Cotter pin

4
7313.21 3/4
7313.21 7/8

7 Nylon locking nut 8 Socket head cap screw

Order Part No. 7313.21 3/4
1 H-41489 2 H-42568 1 H-42583 1 H-42403 2 H-42585 2 HFS203 2 HFS991 4 HFS903

Part No. 7313.21 7/8 H-42562 H-42568 H-42584 H-42404 H-42585 HFS203 HFS991 HFS903

MKIV Unit 3 and 4

Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates. Torlon is a registered trademark of Solvay Advanced Polymers

MKIV Unit 3 ­ Units Built After February 2009

Parts List

HFG672 H-39916 MP-128 MP-128 MP-128 H-39916
7413.FOILSET.BLACK
7413.FOILSET.CLEAR HFG349
HFG297

HFG682

4

H-39392
4
7413.30.BLACK 7413.30.CLEAR
MKIV furlers began shipping with black foils in April 2021. Clear anodized
foils also available.
7413.31
H-42073 H-42074

7413.32 H-39756

Description

Order Part No.

Trim cap set w/o screws

1 HFG682

Trim cap screw set

1 HFG672

Trim cap screw

2

HFS1127

Halyard swivel

1 H-39392

Clip/smalley ring for balls

2

H-39916

Torlon® ball bearings

88 MP-128

Foil set, less bottom foil – Standard

1 7413.FOILSET.BLACK

Foil (7′ / 2.13 m luff)

10 7413.30.BLACK

Foil (2′ / 610 mm) bottom -Standard

1 7413.33.BLACK

Foil set, less bottom foil – (Special order) 1 7413.FOILSET.CLEAR

Foil (7′ / 2.13 m luff)

10 7413.30.CLEAR

Foil (2′ / 610 mm) bottom – (Special order) 1 7413.33.CLEAR

Foil screw set

1 HFG349

Foil screw

46 HFS1106

Connector kit

1 7413.31

Connector (247 mm / 9 3/4″ )

1

—

Connector bushing A

2

H-42073

Connector bushing B

2

H-42074

Foil screw

2

HFS1106

Plastic connector wedge

2

H-39487

Bottom connector kit

1 7413.32

Bottom connector (355 mm / 14″) 1

—

Connector bushing A

2

H-42073

Connector bushing B

2

H-42074

Connector set (No bushings,wedges or screws included)

1

HFG627

Connector (247 mm / 9 3/4″ )

9

—

Bottom connector (355 mm / 14″) 1

—

Connector bushing set

1 HFG297

Connector bushing A (curved/longer) 20 H-42073

Connector bushing B (flat/shorter) 20 H-42074

Plastic connector wedge set

1 HFG324

Plastic connector wedge

22 H-39487

Feeder with screw and tab

1 H-39756

Feeder tab

1

H-38372A

Screw

1

HFS1130

HFG324

7413.33.BLACK 7413.33.CLEAR

UNIT 3

MKIV JIB REEFING & FURLING
Unit 3, 4
Installation Manual ­ Intended for specialized personnel or expert users
Preassembly Safety precautions/parts descriptions Sizing check Parts Line/rigging parts check/tools Dimensions/sailmaker’s instructions Toggle deductions/stay into foil options Top foil length Unit 3/Unit 4 Short top foil Unit 3/Unit 4 Confirm foil length
Assembly Foils/connectors Halyard swivel Drum assembly Rod rigging Attach turnbuckle/toggle Attach toggle/short length plate Attach toggle/long length plate Feeder/final
Commissioning­Unit 3/4 Turnbuckle on boat Lead line to cockpit Halyard wrap/prevent halyard wrap Pendant/halyard: restrainer/ halyard tension
Commissioning–Unit 4 Tying soft attachment tack/head/halyard
Operation Halyards/headstay tension Raise sails/storm sails/reefing Reef/secure sail Race conversion
Maintenance Clean/inspect Replace line Storage/remove furler
Troubleshoot Warranty Appendix

4673 12/18
2 3 4 – 5 6 7 8 9 -10 11 – 12 13
14 – 20 20 21 22 23 24 25 26
27 28 29 30
31
32 33 34 35
36 36 36 37 37 38 – 41

Please read these instructions carefully before installing, servicing, or operating the equipment. This manual may be modified without notice. See: www.harken.com/manuals for updated versions.
PLEASE SAVE THESE INSTRUCTIONS

HFG627 4673 833

5 HFG739
HFG722

HFG947 HFG200/HFG201

945
7304
6 2124
M10 M6 M4 M3 MKIV Unit 3 and 4

Description
5 Instruction manual Blue Loctite®adhesive Red Loctite®adhesive 5200 adhesive set 5200 marine adhesive sealant
Injector
Prefeeder
Description
6 Halyard restrainer (optional) Sheave/ss inner race only Clevis pin (1/4″ x 1.0625″ 18-8) Bracket-large Cotter pin (1/16″ x .500″ 18-8) Halyard deflector Shackle Hex keys M10 M6 M4 M3

Order 1 1 2 1 1
1
1

Part No. 4673 833 HFG739 HFG725 HFG722 HFG200 HFG201 947

Order 1 1 1 1 1 1 3

Part No. 945 945A HCP208 HCP394 HFS181 7304 2124

1

HFG647

1

HFG644

1

HFG640

1

HCP1089

39

MKIV Unit 4

7414.10BASE

4

8 2

5 6

3

1

7

7414.20 7/8 7414.20 1 7414.20 11/8

40

Parts List

HFS1091 H-38819 HFS1091 H-38820
H-38212 HFS854 HFS875

Description

1 Top cover Top cover screw

Bottom flange

Bottom flange screw
1 2 Guard Guard screw (FST-M12X1.75X70MM SHCS)

Clamp

3 Clamp screw (FST-M8X1.25X25MM SHCS A4 SS) Hub assembly

4

Ball plugs

Torlon® ball bearing (1/2″)

Delrin® ball bearing (1/2″)

2
UNIT

Order 2 2 2 2 2 2 1 4 1 5 25 97

Part No. H-38819 HFS1091 H-38820 HFS1091 H-38212 HFS1110 H-45498 HFS1107 7414.10BASE H-38168 MP-128 MP-116

4

HFS1107

3 H-45498

No. Description

Clevis pin

5 Rod adapter stud (-30) w/nosepiece 1 Stud (main body) 2 Nosepiece -30

3 Cotter pin (3/32 x 1.750)

4 Stud cap 7/8″ ID

Grip
4 length Clevis pin
measurements are
“Grip Length.”

Rod adapter stud (-40) w/nosepiece 1 Stud (main body) 2 Nosepiece -40 3 Cotter pin (3/32 x 1.750)
Rod adapter stud (-48) w/nosepiece 1 Stud (main body)

2

3

2 Nosepiece -48 3 Cotter pin (3/32 x 1.750)

Order 1 1 1 2 1 1 1 1 2 1 1 1 2

Part No. 7427 -30 H-41814 H-41813 HFG319 HFG303 7428 -40 H-47146 H-47131 HFG319 7429 -48 H-47147 H-47132 HFG319

MP-128

H-38168

1

MP-116

H-38168

MP-116 H-38168

H-38168 MP-116 H-38168 MP-116

8 2 8
76
4 6

No. Description

7426 -22 7427 -30

6 Jaw/jaw toggle with short link plates 1 Toggle

2 Plates

5

3 Crosspin 4 Clevis pin (7/8″ X 1.958″ 302SS)

5 Isolator

6 Cotter pin (5/32″ X 1.250 18-8)

7 Nylon locking nut

8 SH cap screw (FST-M12X1.75X20MMSHCSA4SS)

Jaw/jaw toggle with short link plates

1 Toggle

2 Plates

3 Crosspin

4 Clevis pin (1″ X 2.231″ A4 SS)

5 Isolator

6 Cotter pin (3/16″ X 2 SS 316)

7 Nylon locking nut

8 Socket head cap screw

Jaw/jaw toggle with short link plates

1 Toggle

2 Plates

3 Crosspin

4 Clevis pin (1.125″ X 2.526″ A4 SS)

5 Isolator

6 Cotter pin (3/16″ X 2 SS 316)

7 Nylon locking nut

8 Socket head cap screw

Order 1 1 2 1 1 2 2 2 4 1 1 2 1 1 2 2 2 4 1 1 2 1 1 2 2 2 4

Part No. 7414.20 7/8 H-42562 H-45449 H-45439 H-42404 H-46403 HFS203 HFS1122 HFS1177 7414.20 1 H-45427 H-45449 H-45440 H-45435 H-46403 HFG743 HFS1122 HFS1177 7414.20 11/8 H-45428 H-45449 H-45441 H-45436 H-46403 HFG743 HFS1122 HFS1177

MKIV Unit 3 and 4

Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates. Torlon is a registered trademark of Solvay Advanced Polymers

MKIV Unit 4
HFG672 H-46469 MP-128 MP-128 MP-128 HCP1292
7414.1/2FOILSET.BLACK
7414.1/2FOILSET.CLEAR HFG948
HFG946
HFG947

Parts List

HFG949
H-45788 7414.30.BLACK 7414.30.CLEAR
MKIV furlers began shipping with black foils in April 2021. Clear anodized
foils also available.
7414.31 H-45542 H-455434
4
7414.32
H-45482

Description
4 Trim cap set w/o screws Trim cap screw set

Order Part No. 1 HFG949 1 HFG672

Trim cap screw

2 HFS1127

Halyard swivel

1 H-45788

Clip/smalley ring for balls

1 H-46469

Clip/smalley ring for liners

1 HCP1292

Torlon® ball bearings (1/2″)

100 MP-128

Foil set, less bottom foil – Standard

2 7414.1/2FOILSET.BLK

Foil (7′ / 2.13 m luff) – Standard 10 7414.30.BLACK

Foil (2′ / 610 mm) bottom -Standard

1

7414.33.BLACK

Foil set, less bottom foil – (Special order) 2 7414.1/2FOILSET.CLR

Foil (7′ / 2.13 m luff) Special order) 10 7414.30.CLEAR

Foil (2′ / 610 mm) bottom (Special order) 1 7414.33.CLEAR

Foil screw set

1 HFG948

Foil screw

48 HFS1176

Connector kit

1 7414.31

Connector (272 mm / 10.7″)

1–

Connector bushing A

2 H-45542

Connector bushing B

2 H-45543

Foil screw

2 HFS1176

Plastic connector wedge

2 H-45509

Bottom connector kit

1 7414.32

Bottom connector (386 mm / 15.2″)

1

—

Connector bushing A

2 H-45542

Connector bushing B

2 H-45543

Connector bushing set

1 HFG946

Connector bushing A (curved/ longer)

23 H-45542

Connector bushing B (flat/shorter) 23 H-45543

Plastic connector wedge set

1 HFG947

Plastic connector wedge

24 H-45509

Feeder with Screw and Tab

1 H-45482

Feeder Tab

1 H-45480

Screw

1 HFS1175

7414.33.BLACK 7414.33.CLEAR

UNIT 4

MKIV JIB REEFING & FURLING Unit 2
Installation Manual ­ Intended for specialized personnel or expert users
Preassembly
Safety Precautions/Parts Descriptions Parts Description Tools Dimensions/Sailmaker’s Instructions Toggle Deductions/Stay Into Foil Options Top Foil Length Short Top Foil Foil Length
Assembly
Foils/Connectors Halyard Swivel Drum Assembly Rod Rigging Turnbuckle Toggle Final
Commissioning
Turnbuckle Line to Cockpit Halyard Wrap/Prevent Halyard Wrap Pendanta/Halyard: Restrainer/Tension Operation
Halyard/Headstay Tension Raise Sails Furl/Reef Secure Sail Race Conversion Maintenance
Clean/Inspect Replace Line Storage Remove Furler
Troubleshoot Warranty Appendix
Please read these instructions carefully before installing, servicing, or operating the equipment. This manual may be modified without notice. See: www.harken.com/manuals for updated versions.
PLEASE SAVE THESE INSTRUCTIONS

4118/12-12-2012
2­3 4­5
5 6 7 8 9 10
11­17 17 18 19 20
20­21 22­23
24 25 26 27
28 29 29­30 30 31
32 32 32 32 30 30

4673
833
5 HFG739
HFG722

HFG947
HFG200/HFG201 Torlon is a registered trademark of Solvay Advanced Polymers Loctite is a trademark of Henkel AG & Company KGaA

M6
6 M5
MKIV Unit 3 and 4

Description
5 Instruction manual Blue Loctite® adhesive Red Loctite adhesive 5200 adhesive set 5200 marine adhesive sealant
Injector
Prefeeder
Description
6 Hex keys M6 M5

Order 1 1 2 1 1
1
1

Part No. 4673 833 HFG739 HFG725 HFG722 HFG200 HFG201 947

Order Part No.

1

HFG644

1

HFG643

41

42

MKIV Unit 3 and 4

UNIT 3:
For boats 14 ­18 M

GIVE IN To a more powerful ReflexTM

The ReflexTM furling system has been proven to deliver very reliable, very smooth top-to-bottom spinnaker furls. How? The Reflex cable leverages its stainless mesh structure to immediately transfer rotational torque to the top swivel — where furls must start to end well. Now, there’s Reflex Unit 3 with Dyneema® in its cable, scaled for halyard loads up to 4.5 tons. Imagine, sailing deep downwind with a very large, colorful sail that furls right up. Give in to that.

WATCH VIDEO

MKIV Unit 3 and 4

43

Corporate Headquarters N15W24983 Bluemound Rd, Pewaukee, WI 53072 USA
Telephone: (262) 691-3320 · Fax: (262) 701-5780 Web: www.harken.com · Email: harken@harken.com
Harken Australia Pty, Ltd. 1B Green Street, Brookvale, N.S.W. 2100, Australia Telephone: (61) 2-8978-8666 · Fax: (61) 2-8978-8667 Web: harken.com.au · Email: info@harken.com.au
Harken France ZA Port des Minimes, BP 3064, 17032 La Rochelle Cedex 1, France
Telephone: (33) 05.46.44.51.20 · Fax: (33) 05.46.44.25.70 Web: harken.fr · Email: info@harken.fr
Harken Italy S.p.A. Via Marco Biagi, 14, 22070 Limido Comasco (CO) Italy Telephone: (39) 031.3523511 · Fax: (39) 031.3520031
Web: harken.it · Email: info@harken.it
Harken New Zealand, Ltd. 158 Beaumont Street
Unit 11, Orams Marine Centre Westhaven, Aukland, 1010, New Zealand Telephone: (64) 9-303-3744 · Fax: (64) 9-307-7987 Web: harken.co.nz · Email: harken@harken.co.nz
Harken Polska Sp. z o.o. ul. Przasnyska 6A, 01-756, Warszawa, Poland Tel: +48 22 561 93 93 · Fax: +48 22 839 22 75
Web: harken.pl · Email: polska@harken.pl
Harken Sweden AB Main Office and Harken Brandstore: Västmannagatan 81B
SE-113 26 Stockholm Sweden Telephone: (46) 0303 61875 · Fax: (46) 0303 61876 Mailing address: Harken Sweden AB, Box 64, SE -440 30 Marstrand
Web: harken.se · Email: harken@harken.se
Harken UK, Ltd. Bearing House, Ampress Lane, Lymington, Hampshire S041 8LW, England
Telephone: (44) 01590-689122 · Fax: (44) 01590-610274 Web: harken.co.uk · Email: enquiries@harken.co.uk
On Deck B.V. Leimuiderdijk 478A, 2156 MX Weteringbrug, The Netherlands
Telephone: 31 71 331 3366 · Fax: 31 71 331 3387 Web: www.on-deck.nl · Email: allhands@on-deck.nl
Printed in USA 4673 v2 04/22

References

• Deck Verzekeringen | Voor de 'slimmeriken'
• Harken: Sailing Blocks, Travelers, Hydraulics, Winches
• Harken: Sailing Blocks, Travelers, Hydraulics, Winches
• Harken: Sailing Blocks, Travelers, Hydraulics, Winches
• Home | Harken Marine
• Harken | Winch, Bozzelli e attrezzatura di coperta per barche a vela | Harken Marine
• Home | Harken Marine
• Harken: Sailing Blocks, Travelers, Hydraulics, Winches
• Harken: Sailing Blocks, Travelers, Hydraulics, Winches
• Manuals & Drawings | Harken
• On Deck - Groothandel in A-merk watersportartikelen - On Deck

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