POWER WING FZ53 Digital Camera

SPECIFICATIONS

FEATURES

The FZ53 is the most powerful 4-cycle engine of its size and was developed for sport flying as well as power-demanding acrobatics.

• Supercharged system
• Fuel-injected
• Regulated and pressurized fuel system
• Muffler

The pressurized fuel and injection system makes throttle response superior and is unaffected by tank level.

GLOW PLUG

Select the most appropriate plug from those designed specifically for 4 cycle engines. Glow plug selection greatly affects the maximum engine output and low idle. We recommend the O. S. Type F Plug.

INSTALLATION

1. Connect the engine to the tank as shown in fig.1. Since high pressure is applied to the tank, tighten all connections carefully. Care must be taken to prevent pressure leakage due to under tightening of the check valve or by kinking the fuel lines.
2. Always use a fuel filter. We recommend the YS fuel filter.
3. Match the direction of the check valve arrow fig.1 with the arrow facing to wards the tank.

PROPELLER INSTALLATION

Due to the high torque of the FZ53 engine, we have equipped it with a double lock system for safety.

1. Mount the propeller and tighten the rear nut. Next, tighten the front nut as shown in Fig.1.
2. Select a good-quality propeller that will turn in the 9,000 to 11,000 rpm range. We recommend sizes 10×9-10×10, 11×7-11×8,12×7-12×8.

START UP

1. Remove tube B from the filter: remove tube A from the check valve, then fill the tank. (CAUTION: If tank is filled or under pressure remove tube A first, then tube B. Fuel will eject if tube B is removed while the tank is pressurized. )
2. Open the needle valve 2 l/2 turns from the fully closed position.
3. Open the throttle fully and slowly turn the propeller 10 times. This primes the system by pressurizing the tank and sending fuel to the carburetor.
4. Close the throttle to the idle position and connect the glow plug battery. The engine is now ready for starting.

DO NOT ATTEMPT TO START FULL THROTTLE, AS THIS IS VERY DANGEROUS.

BREAK IN

To maximize engine performance and increase durability, please follow this break-in procedure:

1. Use the same size (or slightly smaller) propeller than you intend to use in flying.
2. Use a good quality fuel that contains 15-30% nitromethane and oil content of 20-24%. Synthetic or castor oil can be used, or a combination of synthetic and castor. Do not use four-cycle fuel due to low oil content.
3. The needle valve should be set so that the engine is running at a rich setting. Run the engine for approximately 20 minutes with this setting.
4. Mount the engine to the model and fly ten times with this setting. This concludes the break-in procedure, it is advisable to always use a slightly rich setting to keep the moving parts lubricated, even after the break-in period.

HIGH-SPEED ADJUSTMENT

1. Adjustment of high speed is done by the carburetor needle valve.When the needle valve is turned clockwise, the mixture is leaner. When it is turned counterclockwise, the mixture is richer. A good starting position for the high-speed needle valve is 2 1/2 turns open from the fully closed position.
2. When the engine is started, open the throttle gradually. Next, find the peak position (highest RPM) by adjusting the needle valve. Then the needle valve should be opened approximately 1/8 of a turn from full RPM to achieve best performance. The engine may stop if the throttle is opened to full immediately after starting. Wait until the engine temperature rises and then open the throttle slowly.
3. For flying, it is advisable to use a slightly richer mixture setting. By using a richer mixture, the engine temperature is maintained and RPM stability improves.

LOW-SPEED ADJUSTMENT

This engine is equipped with a new low-speed needle valve to adjust the mixture from low to mid-throttle. This needle valve is located on the side of the throttle barrel opposite the throttle arm (Fig.1).

1. Open the low-speed needle to 1 turn from fully closed position.
2. The low-speed needle valve should be set after the high-speed needle valve has been adjusted. Close the throttle gradually to a idle (approximately 2500rpm). Let it idle for 20 to 30 seconds and then slowly advance the throttle. The adjustment is satisfactory at low speed if transition is smooth at this time.
3. If the engine is running rough on idle, the low-speed mixture is rich. If the engine starts to speed up and dies on idle or starts to detonate, when advancing the throttle, the mixture is lean. Turn the low-speed needle valve clockwise to richen and counterclockwise for a leaner mixture (note that the direction of the low-speed needle valve is opposite the high-speed needle valve). Adjustments to the low-speed needle valve should be 1/8 to 1/4 of a turn increment at a time to achieve a smooth throttle response.

IMPORTANT!
The regulator adjusting screw on this engine is factory set. No further adjustments are necessary. If for some reason you have to disassemble the regulator assembly, the regulator adjusting screw should be set flush with the regulator body.

TAPPET CLEARANCE ADJUSTMENT

1. Tappet clearance is factory preset. No adjustment is necessary until after 1 hour of operation (including the break-in period).
2. Clearance adjustment should be done when the engine is cool. When the engine temperature is high, clearance is higher due to thermal expansion.
3. The proper clearance setting should be at 0.04-0.1mm. The adjustment is achieved by loosening the locknut (fig.2) and turning the adjusting screw. Tighten the locknut after the adjustment is achieved. After the initial 1-hour adjustment, this procedure should be performed a few every 2 hours of use.

CAM GEAR TIMING ADJUSTMENT

If for some reason you have to disassemble your engine, please follow these important steps on reassembling the cam gear.

1. Remove the carburetor and backplate assembly. Notice the impression made on the crankshaft counterweight. Position it directly straight down or in line with the case outer seam line.
2. When reinstalling the cam gear, the side with a point mark should be facing the opening of the gearbox. Note that it should also be mounted with the point mark located towards the top of the engine just below the cam followers.

DIAPHRAGM AND CHECK VALVE DISASSEMBLY

Diaphragm

1. Remove the adjustment screw of the valve, and then remove the inside valve and spring.
2. Clean the inside with alcohol or appropriate cleaner. Reassemble.
3. Screw in the regulator screw until flush with the diaphragm body.

Check valve

1. Open the valve by rotating the body counterclockwise.
2. Reassemble the check valve carefully.

IMPORTANT!
Silicone rubber is used in many parts of the YS engine. Use only glow fuel or methanol for cleaning. Gasoline and other volatile solutions will damage the silicone if used.

PARTS DESCRIPTION

| PART # __DESCRIPTION QTY

---|---
1

2

3

4

5

6

7

8

10

| F5101 Crankcase                                               1

F5102A Cylinder Head Assembly

F5102 Cylinder Head & Liner                             1

F5103 Intake Valve                                          1

F5104 Exhaust Valve                                       1

F5105 Valve Spring Set                                     2

F9106 Spring Retainer Set                                 2

F9107 Valve Spring Retainer Clips                     4

F5108 Cylinder O-ring                                          1

F5110 Head Screws                                            4

11

12

13

14

15

16

17

18

19

20

| F5111 Valve Cover                                             1

F5112 Valve Cover Gasket                                    1

F5113 Valve Cover Screws                                   2

F5114 Intake Pipe                                               1

F5115 Intake Pipe O-ring                                      2

F5116 Crankshaft                                               1

F5117 Rear Bearing                                            1

F5118 Front Bearing                                           1

F5119 Front Bearing Oil Seal                                 1

F5120 Drive Washer                                           1

21

22

23

24

25

26

27

28

29

30

| F5121 Drive Washer Retainer                                1

F5122 Propeller Washer                                      1

F5123 Propeller Nut Set                                        2

F5124 Piston                                                      1

F5125 Piston Ring                                               1

F5126 Wrist Pin                                                  1

F5127 Wrist Pin Retainer                                      2

F5128 Rocker Arm Set                                          2

F1213 Tappet Adjusting Screw Set                         2

F1214 Tappet Adjusting Lock Nut                           2

31

32

33

34

35

36

37

38

39

40

| F5131 Rocker Arm Shaft                                       1

F5132 Rocker Arm Screw                                     1

F1217 E Ring Set                                                 2

F5134 Cam Gear                                                1

F5135 Cam Gear Cover                                        1

F5136 Cam Gear Cover O-Ring                             1

F1234 Cam Gear Screws                                      2

F5138 Cam Gear Bearing Set                                2

F5139 Cam Followers Set                                     2

F5140 Push Rods                                               2

41

42

43

44

45

46

47

49

50

| F5141 Push Rod Covers                                       2

F5142 Push Rod Cover O-Ring                              4

F5143 Con Rod                                                  1

F5144A Back Plate Assembly

F5144 Back Plate                                            1

F5145 Disc Valve                                            1

F5146 Disc Valve Pin                                        1

F1229 Disc Valve Set Screw                              1

F5149 Back Plate Gasket                                      1

F5150 Back Plate Screws                                     2

51

52

53

54

55

56

57

58

| F5151A Carburetor Assembly
F5151

F5152 F5153 R6124 F1260S F1258 F1259 F5158S

F5158

| Carburetor Body 1

Throttle Barrel 1

Throttle Barrel Seal 1

Thorottle Barrel Retainer 1

Throttle Arm Set 1

Throttle Stop Screw 1

Throttle Stop Spring 1

Needle Valve Assembly

 | Needle Valve 1
59

60

61

62

63

64

65

66

67

| F1546 F1555 F1256 F1557 F5163 F5186

F5187

|  | Needle Valve O-ring 1

Needle Soket 1

Needle Soket O-ring 2

Needle Valve Detent 1

Fuel Nipple 1

Low Speed Needle Valve 1

Low Speed Needle Valve O-Ring 1

F5164 Carburetor Gasket                                    1

F5165 Carburetor Screws                                    1

F5166A Regulator Assembly                                  4

68

69

70

71

72

73

74

75

76

77

| F5166

F1245 F1246 F5169 R6138 F5171

F5172

| Regulator Body

Regulator Adjusting Screw 1

Regulator Adjusting Screw O-ring 1

Diaphram 1

Regulator Plunger 1

Plunger Spring 1

Regulator Screw Set 2

F5173S Muffler Set

F5173A Muffler Assembly                                  1

F5174 Exhaust Pipe                                         1

F5175 Rock Nuts                                             2

F5180 Gasket Set                                                3

F5181 O-Ring Set                                              11

WARRANTY

Strict quality control is implemented by our factory in all phases, from parts manufacturing to final assembly. If performance deteriorates or a part fails within one year of purchase due to a manufacturing error, YS will repair or replace the engine at no charge. The warranty will not cover normal wear. Should the engine be modified, incorrectly assembled, or abused, there will be a normal charge for parts and labor. The use of four cycle fuel due to low oil content will also void the warranty.

References

• Index of /

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>