GENERAC 4200 Cold Water Gas Pressure Washer Owner’s Manual

Power Washer
Owner’s Manual

MODEL:___
SERIAL:____
DATE PURCHASED:____

Register your Generac product at:
register.generac.com
1-888-922-8482
SAVE THIS MANUAL FOR FUTURE REFERENCE
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.
(000393a)

Introduction and Safety

Read This Manual Thoroughly

Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result  in death or serious injury. (000100a)

If any section of this manual is not understood, contact the nearest Independent Authorized Service Dealer (IASD) or Generac Customer Service at 1-888-436-3722 (1-888- GENERAC), or visit www.generac.com for starting, operating, and servicing procedures.
The owner is responsible for proper maintenance and safe use of the unit.
SAVE THESE INSTRUCTIONS for future reference. This manual contains important instructions that must be followed during placement,  operation, and maintenance of the unit and its components. Always supply this manual to any individual that will use this unit, and instruct them on  how to correctly start, operate, and stop the unit in case of emergency.
The information in this manual is accurate based on products produced at the time of publication. The manufacturer reserves the right to make  technical updates, corrections, and product revisions at any time without notice.

Safety Rules
The manufacturer cannot anticipate every possible circumstance that might involve a hazard. The alerts in this manual, and on tags and decals  affixed to the unit, are not all inclusive. If using a procedure, work method, or operating technique that the manufacturer does not specifically  recommend, verify that it is safe for others and does not render the equipment unsafe.
Throughout this publication, and on tags and decals affixed to the unit, DANGER, WARNING, CAUTION, and NOTE blocks are used to alert  personnel to special instructions about a particular operation that may be hazardous if performed incorrectly or carelessly. Observe them carefully.  Alert definitions are as follows:

Indicates a hazardous situation which, if not avoided, will result in death or serious injury. (000001)

Indicates a hazardous situation which, if not avoided, could result in death or serious injury. (000002)

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. (000003)
NOTE: Notes contain additional information important to a procedure and will be found within the regular text of this manual.
These safety alerts cannot eliminate the hazards that they indicate. Common sense and strict compliance with the special instructions while  performing the action or service are essential to preventing accidents.

Safety Symbols and Meanings
Asphyxiation. Running engines produce carbon monoxide, a colorless, odorless, poisonous gas. Carbon monoxide, if not avoided, will – result in  death or serious injury. (000103)
Electrocution. Water contact with a power 77 source, if not avoided, will result in death or serious injury. – (000104) I
Explosion and Fire. Fuel and vapors are extremely flammable and explosive. Add fuel in a well ventilated area. Keep fire and spark away. Failure 7 to do so will result in death or serious injury. – (000105) |
Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury. (000106b)
Risk of Fire. Hot surfaces could ignite combustibles, resulting in fire. Fire could result in death or serious injury. – (000110)
Vision Loss. Eye goggles are required to be worn when using this machine. Failure to wear eye goggles could result in permanent – vision loss.  (000101) –
Hearing Loss. Hearing protection is recommended when using this machine. Failure to wear hearing protection could – result in permanant hearing  loss. (000107)
Hot Surfaces. When operating machine, do not ae touch hot surfaces. Keep machine away from combustibles during use. Hot surfaces could result  in severe burns or fire. (000108)
Risk of Fire. Verify machine has properly cooled before installing cover and storing machine. Hot surfaces could result in fire. (000109). Moving Parts. Keep clothing, hair, and appendages away from moving parts. Failure to do so could result in death or serious injury. (000111)

Risk of Falling. Use of machine creates wet areas and trip hazards. Be aware of work area conditions. A fall could result in death or serious injury. (000112)
Risk of Falling. Do not use this machine or any components on elevated surfaces. Doing so can result in a fall, serious injury, or death. (000114) Recoil Hazard. Recoil could retract unexpectedly if water pressure is not properly relieved from pump, creating kickback. Kickback could result in death or serious injury. (000113)
Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result  in death or serious injury. (000100a)
Moving Parts. Do not wear jewelry when starting or operating this product. Wearing jewelry while starting or operating this product could result in death or serious injury. (000115)
Personal injury. Risk of fluid injection. Do not aim spray gun at people, animals, electrical devices, or fragile items. Keep out of reach of children. Failure to do so could cause death or serious injury. (000117c)
Environmental Hazard. Always recycle batteries at an official recycling center in accordance with all local laws and regulations. Failure to do so  could result in environmental damage, death, or serious injury. (000228)
Personal Injury / Equipment Damage. Place wand in holster and verify that handle is locked into place before moving. Failure to do so could result  in death, serious injury, or equipment damage. (000244)

General Information and Setup

Know Your Power Washer
Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result  in death or serious injury. (000100a)

Read this manual thoroughly before assembling and operating this unit. Save this manual for future and immediate reference.
Replacement owner’s manuals are available at www.generac.com.

Emissions
The United States Environmental Protection Agency (US EPA) (and California Air Resources Board (CARB), for engines/ equipment certified to  California standards) requires this engine/equipment to comply with exhaust and evaporative emissions standards. Locate the emissions compliance decal on the engine to determine applicable standards. See the included emissions warranty for emissions warranty information. Follow the  maintenance specifications in this manual to ensure the engine complies with applicable emissions standards for the duration of the product’s life.

Remove Contents from Carton

1. Open carton completely by cutting each corner from top to bottom.

2. Remove and verify carton contents prior to assembly. Carton contents should contain one each of the following:
   • Main Unit
   • High-pressure Hose
   • Siphon Hose and Filter
   • Spray Gun
   • Lance
   • Oil
   • Parts Bag (includes):
   — Owner’s Manual
   — Warranty
   — Hose Hook Wire form
   — Bag of Colored Nozzles
   — 4mm Allen Wrench
   — Screws
   — Filter Screen
   — Register your product at https://reg-ister.generac.com/

3. Call Generac Customer Service at 1-888- GENERAC (1-888-436-3722) with the unit model and serial number for any missing carton contents.

4. Record model, serial number, and date of purchase on front cover of this manual.

Assembly

Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result  in death or serious injury. (000100a) Call Generac Customer Service at 1-888- GENERAC _ (1-888-436-3722) for any assembly issues or concerns.  Please have model and serial number available.

1. See Figure 2-1. Pull out pull pin to raise handle and lock into place (A).

2. See Figure 2-2. Install hose hook using screws and Allen wrench.

3. Coil hose and hang on hook.

4. See Figure 2-3. Insert and snap nozzles into spaces provided in panel.

5. See Figure 2-4. Attach siphon tube.

Check Pump Oil

1. Place power washer on a flat, level surface.

2. See Figure 2-5. Clean area around oil fill and remove vented cap/dipstick (A).

3. See Figure 2-6. Check to confirm oil level is between the “L” and “H” on the dipstick when breather is screwed in. lf oil is required, see    Change Pump Oil. DO NOT OVERFILL.

4. Install oil dipstick until finger tight.

5. Clean up any spilled oil.

Add Engine Oil
Unit is shipped with no oil in the engine.
Add engine oil before starting. See Engine Oil Recommendations.

1. Place power washer on a level surface.

2. Verify oil fill area is clean.

3. Remove oil fill cap and wipe dipstick clean.

4. Add recommended engine oil.
   NOTE: Some units have more than one oil fill location. It is only necessary to use one oil fill point.

5. Thread dipstick into oil filler neck. Oil level is checked with dipstick fully inserted.

6. See Figure 2-8. Remove dipstick and verify oil level is within safe operating range.

7. Install oil fill cap/dipstick and hand-tighten.

Fuel
Explosion and Fire. Fuel and vapors are extremely flammable and explosive. Add fuel in a well ventilated area. Keep fire and spark away. Failure to  do so will result in death or serious injury. (000105)

Fuel requirements are as follows:

• Clean, fresh, unleaded gasoline.
• Minimum rating of 87 octane/87 AKI (91 RON).
• Up to 10% ethanol (gasohol) is acceptable.
• DONOT use E85.
• DONOT use a gas oil mix.
• DONOT modify engine to run on alternate fuels.
• Add a fuel stabilizer prior to storing.

1. Verify unit is OFF and cooled for a minimum of two minutes prior to fueling.

2. Place unit on level ground in a well ventilated area.

3. See Figure 2-9. Clean area around fuel cap and remove cap slowly.

4. Slowly add recommended fuel. Do not overfill

5. Install fuel cap.
   NOTE: Allow spilled fuel to evaporate before starting unit.

Water Supply
NOTE: DO NOT run unit without sufficient water supply. Failure to follow water supply requirements will void unit warranty.
Water supply must meet the following requirements:

• DO NOT siphon standing water for the water supply.
• Water temperature must be less than 100°F (38°C).
• Water supply hose length must not exceed 50 ft (15.2 m).
• Water must be greater than 3.8 gallons per minute (17.3 liters per minute) and no less than 30 psi (206.8 kPa).
• DO NOT use a one-way valve, vacuum breaker, or check valve in any part of the water supply.

Connect Water Supply

1. Remove and discard shipping cap from the pump water inlet.
2. Run water supply for 30 seconds prior to connection to eliminate debris.
3. See Figure 2-10. inspect inlet screen for debris (A). Clean screen or replace as necessary. DO NOT run power washer if inlet screen is damaged or missing.
4. See Figure 2-10. Connect water supply hose to pump water inlet (A) and hand- tighten.

Connect High-Pressure Hose and Lance

1. See Figure 2-11. Connect lance to spray gun and hand-tighten.

2. Place spray gun and nozzle extension into spray gun holder.

3. See Figure 2-12. Connect high-pressure hose to pump using quick-connect fitting.

4. See Figure 2-13. Connect high-pressure hose to base of spray gun using quick- connect fitting.

Spray Gun
Become familiar with spray gun trigger and locking system prior to use.

1. See Figure 2-14. With unit OFF, hold spray gun and squeeze trigger to learn how trigger mechanism and locking system can be activated and  deactivated.

2. Turn ON the water, and squeeze the trigger to purge the pump system of air.

3. Verify spray gun is OFF with lock engaged before starting power washer.

Nozzles

1. Select correct nozzle for task.
2. See Figure 2-15. Pull back quick—connect collar and install nozzle.
3. Release quick-connect collar to secure nozzle.
4. Verify nozzle is locked in place.

Nozzle Selection Guide

Blast
Pressure
Nozzle
(Red)| | MAXIMUM – Higher pressure and lower flow for stubborn or hard to reach surface such as second story surfaces, paint removal, oil stains, rust removal or other stubborn substances (tar, gum, grease, wax, etc.).
Strip
Pressure
Nozzle
(Yellow)| | MEDIUM – Higher pressure and medium flow for removing stains on hard porous surfaces such as concrete driveways, garage floors and brick patios.
clean Pressure Nozzle (Green )| | GENERAL – Medium pressure and medium flow for most all purpose cleaning such as home siding, brick patios, wood decks, driveways and
sidewalks, garage floors, etc.
Wash Pressure Nozzle (White)| | DELICATE – Lower pressure and higher flow for gentle cleaning of cars/trucks, boats, RV’s, patio furniture, lawn equipment, etc.
Detergent
Nozzle
(Black)| | DETERGENT ONLY (BLACK), Only use power washer safe detergents/soaps to help break down stubborn dirt and grime on a variety of surfaces.

Operation

Operation and Use Questions
Call Generac Customer Service at 1-888-GENERAC (1-888-436-3722) with questions or concerns about unit operation and maintenance.

Before Starting Engine

1. Verify engine oil level is correct.
2. Verify fresh fuel level is correct.
3. Verify all fittings and couplers are properly secured.
4. Verify sufficient water supply is properly connected.
5. Verify unit is secure on level ground, with proper clearance and is in a well ventilated area.

Prepare Power Washer for Use

1. Place unit on level ground, within the specified clearance required.
2. Connect appropriate water supply.

Power Washer Placement for Use

Asphyxiation. Running engines produce carbon monoxide, a colorless, odorless, poisonous gas. Carbon monoxide, if not avoided, will result in death or serious injury. (000103)

Risk of Fire. Hot surfaces could ignite combustibles, resulting in fire. Fire could result in death or serious injury. (000110)

Hot Surfaces. When operating machine, do not mmm touch hot surfaces. Keep machine away from combustibles during use. Hot surfaces could result in severe burns or fire. (000108)

It is a violation of California Public Resource Code, Section 4442, to use or operate the engine on any forest-covered, brush-covered, or grass-covered land unless the exhaust system is equipped with a spark arrester, as defined in Section 4442, maintained in effective working order. Other states or federal jurisdictions may have similar laws. Only operate power washer outdoors in a well ventilated area. Never operate power washer indoors, or in a confined space. Be aware of building openings and ventilation systems where exhaust may enter during use.

• Verify power washer is placed on level ground to avoid tipping during operation.
• Only use the unit outdoors. Verify exhaust gas does not enter a confined area through windows, doors, ventilation intakes.
• See Figure 3-1. Keep at least 5 ft (1.5 m) of clearance on all sides of power washer including overhead from dwellings and combustibles, when in use.

Transporting/Tipping of the Unit
Do not operate, store or transport the unit at an angle greater than 15 degrees.

Power Washer Start-Up
NOTE: DO NOT run power washer without a sufficient water supply turned ON. Damage to equipment resulting from failure to follow this instruction will NOT be covered under warranty.

1. Connect a sufficient water supply.

2. See Figure 3-2. Move fuel valve lever (A) to ON position.

3. Move choke lever (B) to CLOSED position.
   NOTE: For warm engine starts, choke lever (B) may need to be in HALF-OPEN or OPEN position. Move choke lever to closed position if engine does not start in HALF-OPEN or OPEN position, then attempt engine start.

4. See Figure 3-2. Move the throttle lever (C – if equipped) to the FULL (rabbit) position.

5. See Figure 3-3. Turn engine switch ON.

Vision Loss. Eye goggles are required to be worn when using this machine. Failure to wear eye goggles could result in permanent vision loss. (000101)

6. Relieve spray gun pressure.

7. Place foot on unit to secure unit from movement when pulling recoil.

8. See Figure 3-4. Firmly grasp the recoil handle. Pull slowly until resistance is felt.
   Then pull rapidly to start engine.
   Recoil Hazard. Recoil could retract unexpectedly if water pressure is not properly relieved from pump, creating kickback. Kickback could result in death or serious injury. (000113) Personal injury. Risk of fluid injection. Do not aim spray gun at people, animals, electrical devices, or fragile items. Keep out of reach of children. Failure to do so could cause death or serious injury. (000117c)
   After engine-start attempt, if engine fails to run, point spray gun in safe direction, and squeeze spray gun trigger to release high pressure.

9. Return recoil handle slowly. DO NOT let recoil snap back against recoil housing.

10. See Figure 3-2. When engine starts, slowly move choke lever (B) to OPEN position as engine warms. If engine falters, move choke lever to CLOSE position, then to OPEN position.

11. Move the throttle lever (C – if equipped) toward the High position to adjust engine speed.
    • If engine fails to start after six pulls, move choke lever (B) to OPEN position, and repeat steps 6 through 9.

Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury. (000106b)
Risk of Fire. Hot surfaces could ignite combustibles, resulting in fire. Fire could result in death or serious injury. (000110)
Hot Surfaces. When operating machine, do not touch hot surfaces. Keep machine away from combustibles during use. Hot surfaces could result in severe burns or fire. (000108)

Power Washer Shut Down
Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury. (000106b)

IMPORTANT: Spray gun traps high-pressure water, even when engine is stopped and water is disconnected. Always point spray gun in safe direction, and squeeze spray gun trigger to release high-pressure. Engage trigger lock when not in use.

1. Release spray gun trigger.
2. Turn engine switch OFF.
3. Squeeze spray gun trigger and release high-pressure water.
4. Engage trigger lock.
5. Turn water supply OFF.
   NOTE: Keep high-pressure hose connected to pump and spray gun while system is pressurized.

Apply Detergent
Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury. (000106b)
Personal injury. Risk of fluid injection. Do not aim spray gun at people, animals, electrical devices, or fragile items. Keep out of reach of children. Failure to do so could cause death or serious injury. (000117c)
NOTE: DO NOT use caustic liquid with power washer. Use ONLY power washer safe deter- gents. Follow manufacturer instructions on detergent label.

Apply detergent as follows:

1. Prepare detergent solution as required by job.

2. Make sure siphoning tube remains fully submerged into the detergent.

3. When inserting the siphon into a detergent solution bottle, route the tube so as to keep it from inadvertently contacting the hot muffler.

4. Verify black detergent nozzle is installed.
   NOTE: Detergent cannot be applied with high- pressure nozzle (Yellow, White, Green or Red). Only use black nozzle with detergent.

5. Start engine.

6. Firmly grasp spray gun with both hands when using high-pressure spray to avoid injury when spray gun kicks back.

7. Apply a high-pressure spray to a small area and then inspect surface for damage. If no damage is found, continue to apply detergent.

8. Apply detergent to a dry surface, start at lower portion of area to be washed and work upward using long, even, overlapping strokes.

IMPORTANT: Flush the detergent siphoning system after each use. Contact an authorized dealer or qualified service center with questions.

Rinsing

Risk of Falling. Use of machine creates areas and trip hazards. Be aware of work area conditions. A fall could result in death or serious injury. (000112)
Risk of Falling. Do not use this machine or any components on elevated surfaces. Doing so can result in a fall, serious injury, or death. (000114)

1. Remove black detergent nozzle from lance.
2. Select and install desired high-pressure nozzle.
3. Point spray gun in safe direction and squeeze trigger to flush remaining detergent from system.
4. Keep spray gun a safe distance from area you plan to spray.
5. Firmly grasp spray gun with both hands when using high-pressure spray to avoid injury when spray gun kicks back.
6. Apply a high-pressure spray to a small area and then inspect surface for damage. If no damage is found, continue rinsing.
7. Start at top of area to be rinsed, working down with same overlapping strokes as used for cleaning.

Clean Detergent Siphoning Tube

Flush detergent siphoning tube after each use, before stopping the engine.

1. Place detergent siphoning tube/filter in bucket of clean water.
2. Remove high-pressure nozzle from nozzle extension.
3. Select and install black detergent nozzle.
4. Flush for 1-2 minutes.
5. Shut engine OFF.
6. Point spray gun in a safe direction, squeeze spray gun trigger to release retained high water pressure. Engage trigger lock.

After Each Use
DO NOT allow water to remain in unit for long periods of time. Sediments or minerals can deposit on pump parts and freeze pump. Follow these procedures after every use:

1. Shut engine OFF.
2. Turn water supply OFF.
3. Point spray gun in a safe direction, and squeeze trigger to relieve trapped pressure.
4. Let engine cool.
5. Disconnect hoses from spray gun and high-pressure outlet on pump. Drain water from hoses, spray gun, and lance. Use a rag to wipe off components.
6. Very engine start switch and fuel valve is Off.
7. Pull recoil handle approximately six times to remove remaining liquid from pump.
8. Store unit in a clean, dry area.
   NOTE: If storing for more than 30 days, see Storage section.

Automatic Cool Down System (Thermal Relief)
When power washer runs for 3-5 minutes without spray gun activation, circulating water in pump can reach temperatures to cause burns. Thermal relief system engages to cool pump by discharging warm water onto ground. Adjustable Pressure Setting
The pressure washer pump is equipped with an adjustable pressure setting. The pump is preset at the factory to the highest pressure setting. To decrease pressure, turn the pressure control knob counterclockwise to the desired pressure. Turn the pressure control knob fully clockwise to set the pressure back to the factory setting.

Maintenance and Troubleshooting

Maintenance
Regular maintenance will improve performance and extend engine/equipment life. Generac Power Systems, Inc. recommends that all maintenance work be performed by an Independent Authorized Service Dealer (IASD). Regular maintenance, replacement, or repair of the emissions control devices and systems may be performed by any repair shop or person of the owner’s choosing. To obtain emissions — control warranty service free of charge, the work must be performed by an IASD. See the emissions warranty.

Power washer warranty does not cover items subjected to operator abuse or negligence. To receive full warranty value, operator must maintain  power washer as instructed in this manual, including proper storage as detailed in Storage.

NOTE: Call 1-888-GENERAC (1-888-436-3722) with questions about component replacement.

NOTE: All required service and adjustments should be each season, as detailed in  Maintenance Schedule.

Maintenance Schedule
Follow maintenance schedule _ intervals, whichever occurs first according to use.
NOTE: Adverse conditions will require more frequent service.

First 5 Hours

Change engine oil
Every 8 Hours or Daily
Inspect/clean water inlet screen
Inspect high-pressure hose
Inspect detergent siphoning hose/filter
Inspect spray gun and assembly for leaks
Clean debris
Inspect engine oil level
Inspect pump oil level
Every 50 Hours or Every Year
Inspect/clean air cleaner filter”
Change engine oil
Change pump oil
Inspect muffler and spark arrestor*
Every 100 Hours or Every Year
Service spark plug

• Clean if clogged. Replace if perforated or torn.
  ** Service more often under dirty or dusty conditions.

Preventive Maintenance
Dirt or debris can cause improper operation and equipment damage. Clean power washer daily or before each use. Keep area around and behind muffler free from combustible debris. Inspect all cooling air openings on power washer.

• Use a damp cloth to wipe exterior surfaces clean.
• DO NOT insert any objects through cooling air openings.
• Use a soft bristle brush to loosen caked on dirt, oil, etc.
• Use a vacuum to pick up loose dirt and debris.

Inspect and Clean Inlet Screen
Inspect inlet screen on pump water inlet.
Clean clogged screen and replace screen if damaged.

Inspect High-Pressure Hoses
High-pressure hoses can develop leaks from wear, kinking, or abuse. Inspect hoses before each use. Inspect for cuts, leaks, abrasions, bulging, and damage or movement of couplings. If these conditions exist, replace hose immediately.

NOTE: DO NOT repair high-pressure hose.
Replace with hose that meets or exceeds maximum pressure rating of unit.

Inspect Detergent Siphoning Tube
Inspect filter on detergent tube and clean if clogged. Tube should fit tightly on barbed fitting. Examine tube for leaks or tears.
Replace filter or tube if either is damaged.

Inspect Spray Gun
NOTE: Replace spray gun immediately if it fails any test steps.

1. Verify spray gun hose connection is secure.
2. Squeeze and release trigger.
   NOTE: Trigger should spring back into place and lock when released.

Nozzle Maintenance
A pulsing sensation felt when squeezing spray gun trigger may be caused by excessive pump pressure. Typical causes of excessive pump pressure are nozzle clog or restriction.
Immediately clean nozzle as follows:

Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury. (000106b)

1. Turn engine and water supply OFF.
   NOTE: Keep high-pressure hose connected to pump and spray gun while system is pressurized.

2. Relieve spray gun water pressure.

3. Remove nozzle from lance.

4. See Figure 4-2. Use a paper clip to remove debris.

5. See Figure 4-3. Remove lance from spray gun and back flush thoroughly.

6. Install nozzle on lance.

7. Install lance on spray gun.

8. Verify hose is connected to pump water inlet, and high-pressure hose is connected to spray gun and pump.

9. Turn water ON.

10. Start engine.

11. Test power washer by operating with each quick connect nozzle.

Change Pump Oil

1. Clean area around oil drain plug. See Figure 4-4.

2. Place a small pan under oil drain plug to catch oil.

3. Remove oil drain plug (B). Drain oil completely.

4. Install oil drain plug. Do not over tighten.

5. Clean area around pump oil dipstick (A).

6. Fill pump with SAE 30 non-detergent oil.
   Oil level must be within markings on dipstick when breather is screwed in. See Figure 4-5. Do not overfill.

7. Install oil dipstick until finger tight.

8. Clean up any spilled oil.

Engine Maintenance
Engine Oil Recommendations
To maintain the product warranty, the engine oil should be serviced in accordance with the recommendations of this manual. For your convenience, maintenance kits designed and intended for use on this product are available from the manufacturer that include engine oil, oil filter, air filter, spark plug(s), a shop towel and funnel. These kits can be obtained from an Independent Authorized Service Dealer (IASD).
Climate determines proper engine oil viscosity. See chart to select correct viscosity.

• Below 50°F (10°C) use of SAE 30 will result in hard start.
  ** Above 80°F (27°C) use of 10W30 may cause increased oil consumption. Inspect oil level more frequently.

Inspect Engine Oil Level
Inspect engine oil level prior to each use, or every 8 hours of operation.

1. Place power washer on a level surface.

2. Clean area around oil fill.

3. See Figure 4-7. Remove oil fill cap and wipe dipstick clean.

4. See Figure 4-8. Screw dipstick into filler neck. Verify proper oil level on dipstick.

5. Add recommended engine oil as necessary.

6. Replace oil fill cap and hand-tighten.
   NOTE: Some units have more than one oil fill location. It is only necessary to use one oil fill point.

Change Engine Oil
When using power washer under extreme, dirty, dusty conditions, or in extremely hot weather, change oil more frequently.
NOTE: Don’t pollute. Conserve resources. Return used oil to collection centers.

Change oil while engine is still warm from running, as follows:

1. Place power washer on a level surface.
2. Disconnect the spark plug wire from the spark plug and place the wire where it cannot contact spark plug.
3. Clean area around oil fill, and oil drain plug.
4. Remove oil fill cap.
5. See Figure 4-9. Remove oil drain plug (A) and drain oil completely into a suitable container.
6. Install oil drain plug and tighten securely.
7. See Figure 4-8. Slowly pour oil into oil fill opening until oil level is between L and H marks on dipstick. DO NOT overfill.
8. Install oil fill cap, and finger tighten.
9. Wipe up any spilled oil.
10. Properly dispose of oil in accordance with all applicable regulations.

Air Filter
Engine will not run properly and may be damaged if run with a dirty air cleaner. Service air cleaner more frequently in dirty or dusty conditions.

To service air cleaner:

1. Remove air cleaner cover.
2. Remove filter element(s).
3. Inspect filter element(s) and replace if damaged. To order replacements, contact Generac Customer Service at 1-888-GENERAC (888-436-3722) for the name of your nearest IASD.
4. Tap paper filter element several times on hard surface to remove dirt. Compressed air (not exceeding 30 psi (207 kPa) can also be used to blow through filter element from the inside.
5. Use a clean, damp cloth to wipe dirt from inside air cleaner cover.
6. Put cleaned or new filter element(s) in place. Verify gasket is in place (if equipped).
7. Install air cleaner cover. Tighten air cleaner screws or fasteners securely.

Service Spark Plug
To service spark plug:

1. Clean area around spark plug.

2. Remove and inspect spark plug.

3. See Figure 4-10. Inspect electrode gap with wire feeler gauge and replace spark plug if gap (A) is not within specification listed on Product Specifications Sheet.
   NOTE: Replace spark plug if electrodes are pitted, burned or porcelain is cracked. Use ONLY recommended replacement plug. See Product Specifications Sheet.

4. Install spark plug finger tight, and tighten an additional 3/8 to 1/2 turn using spark plug wrench.

Inspect Engine Spark

Accidental Start-up. Disconnect spark plug wire when working on unit. Failure to do so could result in death or serious injury. (000102)

1. Disconnect spark plug wire from spark plug.
2. Secure spark plug wire where it cannot contact spark plug.
3. Test spark plug with approved spark plug tester.
   NOTE: DO NOT inspect for spark with spark plug removed.

Inspect Muffler And Spark Arrestor
NOTE: It is a violation of California Public
Resource Code, Section 4442, to use or operate the engine on any forest- covered, brush-covered, or grass-covered land unless the exhaust system is equipped with a spark arrestor, as defined in Section 4442, maintained in effective working order. Other states or federal jurisdictions may have similar laws.

NOTE: Call 1-888-GENERAC (1-888-436-3722) with questions about component replacement.
NOTE: Use ONLY original equipment replacement parts.

Inspect muffler for cracks, corrosion, or other damage. Remove spark arrestor, if equipped, inspect for damage or carbon blockage. If replacement parts are required.

Inspect Spark Arrestor Screen (if equipped)
Hot Surfaces. When operating machine, do not mam touch hot surfaces. Keep machine away from combustibles during use. Hot surfaces could result in severe burns or fire. (000108)

1. See Figure 4-11. Loosen fasteners (A) and remove heat shield from muffler.
2. See Figure 4-12. Loosen fasteners (B) and remove spark arrestor from muffler.
3. Inspect spark arrestor. Replace if torn, perforated or otherwise damaged.
4. If screen is not damaged, clean it with a commercial solvent and replace.

Storage General
Explosion and Fire. Fuel and vapors are extremely flammable and explosive. Add fuel in a well ventilated area. Keep fire and spark away. Failure to do so will result in death or serious injury. (000105)

Risk of Fire. Verify machine has properly cooled before installing cover and storing machine. Hot surfaces could result in fire. (000109)

• DO NOT place a storage cover on a hot power washer. Allow unit to cool to room temperature before storage.
• DO NOT store fuel from one season to another unless properly treated.
• Replace fuel container if rust is present. Rust in fuel will cause fuel system problems.
• Cover unit with a suitable protective, moisture resistant cover.
• Store unit in a clean and dry area.
• Always store power washers and fuel away from heat and ignition sources.

Prepare Fuel System for Storage
Fuel stored over 30 days can go bad and damage fuel system components. Keep fuel fresh, use fuel stabilizer.
If fuel stabilizer is added to fuel system, prepare and run engine according to Power Washer Start-Up Run engine for 2 minutes to circulate stabilizer throughout fuel system.
Adequately prepared fuel can be stored up to 24 months.

NOTE: If fuel has not been treated with fuel stabilizer, it must be drained into an approved container. Run engine until it stops from lack of fuel. Use of fuel stabilizer in fuel storage container is recommended to keep fuel fresh.

Prepare Engine for Storage

1. Change engine oil.
2. Remove spark plug.
3. Pour a tablespoon (5-10cc) of clean engine oil or spray a suitable fogging agent into cylinder.
4. Pull starter recoil several times to distribute oil in cylinder.
5. Install spark plug.
6. Pull recoil slowly until resistance is felt.
7. This will close valves so moisture cannot enter engine cylinder. Gently release recoil.

Change Oil
Change engine oil before storage. See  Change Engine Oil.

Prepare Pump for Storage
NOTE: If not using power washer for more than 30 days, prepare engine and pump for storage.
Protect unit from freezing temperatures.
Failure to do so will permanently damage pump and render unit inoperable. Freeze damage is not covered under warranty. Protect unit from freezing temperatures as follows:

1. Shut engine OFF.
2. Turn fuel valve to OFF.
3. Turn water supply OFF.
4. Point spray gun in a safe direction, and squeeze trigger to relieve trapped pressure.
5. Let engine cool.
6. Disconnect hoses from spray gun and high-pressure outlet on pump. Drain water from hoses, spray gun, and lance. Use a rag to wipe off components.
7. Empty pump of all remaining liquids.
8. Pull recoil handle approximately six times to remove remaining liquid from pump.
9. Winterize pump with Generac Pump Shield™. This minimizes freeze damage and lubricates pistons and seals.

NOTE: If Generac Pump Shield™ is not available, connect a 3 ft (1 m) section of garden hose to water inlet adapter. Pour RV-antifreeze (alcohol free antifreeze) into hose. Pull recoil handle twice. Disconnect hose.
Store unit in a clean and dry area.

Troubleshooting

Pump fails to produce pressure, has erratic pressure. chattering, loss of pressure, low water volume.| 1. Low pressure nozzle installed.
2. Water inlet is obstructed.
3. Inadequate water supply.
4. Inlet hose kinked or leaking.
5. Clogged hose inlet screen.
6. Water supply is over 100°F (38 °C).
7. High-pressure hose is obstructed, or leaks.
8. Spray gun leaks.
9. Nozzle is obstructed.
10. Pump is faulty.
11. Dirty fuel filter.| 1. Replace with high-pressure nozzle.
2. Clean inlet.
3. Provide adequate water flow.
4. Straighten inlet hose. patch leak.
5. Inspect and dean inlet hose screen.
6. Provide cooler water supply.
7. Clear obstructions or replace hose.
8. Replace spray gun.
9. Clean nozzle.
10. Contact IASD.
11. Replace fuel filter.
Detergent fails to mix with spray.| 1. Detergent siphoning tube is not submerged.
2. Detergent siphoning tube/ filter is obstructed or cracked.
3. High-pressure nozzle installed.| 1. Insert detergent siphoning tube into detergent.
2. Clean or replace filter/ detergent siphoning tube.
3. Install low-pressure nozzle.
Engine runs well at no-load, but bogs down when load is applied.| 1. Engine speed too low.
2. Dirty fuel filter.| 1. Contact IASD.
2. Replace fuel filter.
Engine will not start. or starts and runs rough.| 1. Dirty air filter.
2. Out of fuel
3. Stale fuel.
4. Spark plug wire not connected to plug.
5. Bad spark plug.
6. Water in fuel.
7. Excessively rich fuel mixture.
8. Dirty fuel filter.| 1. Clean or replace air filter.
2. Fill fuel tank.
3. Replace with fresh fuel.
4. Connect wire to spark plug.
5. Replace spark plug.
6. Drain fuel tank, replace with fresh fuel.
7. Contact IASD.
8. Replace fuel filter.
Engine shuts down during operation.| 1. Out of fuel.| 1. Fill fuel tank.
Engine lacks power.| 1. Dirty air filter.| 1. Replace air filter.

Notes _____

Part No. 0K8031 Rev. D 01/19/2021
©2021 Generac Power Systems, Inc.
All rights reserved
Specifications are subject to change without notice.
No reproduction allowed in any form without prior written consent from Generac Power Systems, Inc.

Generac Power Systems, Inc.
S45 W29290 Hwy. 59
Waukesha, WI 53189
1-888-GENERAC (1-888-436-3722)
www.generac.com

References

• Product Registration & Activation
• Product Registration & Activation
• P65Warnings.ca.gov

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