Westinghouse WPX3600, WPX3800, WPX4400 - Pressure Washer Manual

INTRODUCTION

Operating, servicing, and maintaining this equipment can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, and wear gloves or wash your hands frequently when servicing this equipment. For more information go to www.P65warnings.ca.gov.

Specifications	WPX3600	WPX3800	WPX4400
Pressure (psi/bar):	3600/248	3800/262	4400/303
Flow Rate (GPM/LPM):	2.7/10.22	3.6 /13.63	4.2 /15.9
Water Temperature (oF/oC):	104o/40o Max	104o/40o Max	104o/40o Max
Hose Length (ft/m):	35/10.6	35/10.6	50/15.24
Soap Tank Capacity (Gal/L/Oz):	0.8/3/101	0.8/3/101	N/A
Engine Displacement (cc):	212	274	420
Starting Type:	Recoil	Recoil	Recoil
Fuel Capacity (Gal/L):	0.95 gal/3.6L	1.32 gal/5L	1.72 gal/6.5L
Fuel Type:	87–93 octane*	87–93 octane*	87–93 octane*
Oil Capacity (ml):	500ml	700ml	1000ml
Oil Type:	SAE 10W-30	SAE 10W-30	SAE 10W-30
Spark Plug:	F7TC	F7TC	F7TC
Spark Plug Gap:	0.024 – 0.032 in. (0.60 – 0.80 mm)	0.024 – 0.032 in. (0.60 – 0.80 mm)	0.024 – 0.032 in. (0.60 – 0.80 mm)
Nozzles:	0°,15°, 25°, 40°, Soap	0°,15°, 25°, 40°, Soap	0°,15°, 25°, 40°, Soap
Certifications:	EPA CARB	EPA CARB	EPA CARB

*Ethanol content of 10% or less. DO NOT use E15 or E85.

PRODUCT REGISTRATION
For trouble-free warranty coverage, it is important to register your Westinghouse product.
You can register by:

• Completing and mailing the product registration card included in the carton.
• Registering your product on-line at:wpowereq.com/pages/warranty-registration
• Scanning the following QR code with your smartphone camera to be directed to the mobile registration link.

• Sending the following product information to:
  Westinghouse Outdoor Power
  Warranty Registration
  777 Manor Park Drive
  Columbus, OH 43228

Keep your purchase receipt for trouble-free warranty coverage.

NOTICE
This product is designed and rated for continuous operation at ambient temperatures up to 104°F (40°C). If needed, this product can be operated at temperatures ranging from 5°F (15°C) –122°F (50°C) for short periods. If the product is exposed to temperatures outside of this range during storage, it should be brought back within this range before operation. This product must always be operated outdoors in a well-ventilated area and far away from doors, windows, and other vents.
Maximum power decreases about 3.5% for each 1,000 feet above sea level, and will also decrease about 1% for each 10°F (6°C) above 60°F (16°C) ambient temperature.

NOTICE
Thank you for choosing Westinghouse! PLEASE READ BEFORE RETURNING THIS PRODUCT FOR ANY REASON.
If you have a question or experience a problem with your Westinghouse purchase, call us at 1-855-9443571 to speak with an agent.
SAVE THIS MANUAL FOR FUTURE REFERENCE.

HAVE QUESTIONS?
Email us at service@wpowereq.com or call 1-855-944-3571

COMPONENTS

1. Spray Gun
2. Gun Lance
3. Recoil Starter
4. Oil Dipstick/Filler Neck
5. Air Filter
6. Pump
7. Detergent Hose Connection Barb
8. High Pressure Outlet
9. Water Inlet
10. Fuel Tank
11. High Pressure Hose
12. Fuel On/Off Switch
13. Choke
14. Nozzles
15. Detergent Tank (WPX3600/WPX3800)
16. Oil Drain Plug
17. Engine On/Off Switch

UNDERSTANDING YOUR PRESSURE WASHER
See Figure 1.
To reduce the risk of injury and product failure, read and understand the information in this user's manual as well as the information on the product labeling.

SPRAY GUN
Use the spray gun and lance to control and direct the stream of water.

THERMAL RELIEF VALVE
When water reaches 125°F warm water will discharge from pump onto ground to help prevent internal pump damage.

RECOIL STARTER
Pull to start engine.

OIL DIPSTICK
Unscrew the oil dipstick to check oil levels and add oil when needed.

PUMP
Generates high pressure.

HANDLE
Use the handle when transporting the unit.

HIGH PRESSURE HOSE
The high pressure hose included with this unit is light weight, flexible, and durable. When not in use, the hose can be stored on the hose retainer.

HIGH PRESSURE OUTLET
Connection for high pressure hose.

WATER INLET
Connection for garden hose.

FUEL TANK
Fill with regular unleaded fuel. Do not overfill.

FUEL ON/OFF SWITCH
Turns fuel supply to the engine on and off.

CHOKE
Prepares a cold engine for starting.

NOZZLES
Nozzles of varying sizes are included with this unit and can be used for different cleaning applications.

DETERGENT TANK (WPX3600 and WPX3800 only)
Siphons detergent into the low pressure stream and automatically turns on when using the black soap nozzle. Only use with pressure washer safe detergent.

OIL DRAIN PLUG
Used to drain engine oil.

ENGINE ON/OFF SWITCH
Turn switch to the ON position before using the recoil starter. Turn to the OFF position to stop the engine.

DETERGENT HOSE CONNECTION BARB
Connects detergent tank to pump.

NOZZLE CLEANING TOOL
Used to clean nozzles.

ASSEMBLY

CARTON CONTENTS

Weight hazard. Always have assistance when lifting the pressure washer.

• Carefully open the carton.
• Remove and save the carton contents.
• Remove and discard the packing tray.
• Unfold the top of the plastic bag enclosing the pressure washer.
• Carefully cut the vertical corners of the carton.
• Recycle or dispose of the packaging materials properly.

CARTON CONTENTS
Item	Quantity
User manual	1
Quick Start Guide	1
Bottle 10W-30 oil	1
Bottle funnel tip	1
Spray gun	1
Spray gun lance	1
Handle	1
High pressure hose	1
Mounting foot	1
Nozzle cleaning tool	1
Spray nozzles	5
Nut, M8	1
Spray gun upper holder	1
Push rivet	1
Spray gun lower holder	1
Bolt and nut, M6	1
Washers	2
Pump oil dipstick	1

If any parts are missing, contact our service team at service@wpowereq.com or call 1-855-944-3571.

INSTALL HANDLE

1. Handle
2. Lower Frame
3. Bolt
4. Handle Knob

See Figure 2.

• The handle is shipped in the storage position. Before using, move the handle to the operating position.
• Turn the handle so it is facing away from the pressure washer. Install on the lower frame.
• Insert the bolt through the frame and secure with the handle knob.

CONNECT HANDLE BRACKETS

See Figure 3.
Connect the spray gun holder and the high pressure hoseholder on the handle using a wrench and the supplied bolts.

1. Spray gun holder
2. High pressure hose holder
3. Bolts

INSTALL THE UPPER GUN HOLDER

See Figure 4.
From the front of the unit, remove top-right bolt, washers, and nut. Reinstall with the upper spray gun holder. From the rear of the unit, install the push rivet as shown.

1. Nozzle holders
2. Trigger handle
3. Hose

INSERT NOZZLES

See Figure 4.
Insert the colored nozzles into the corresponding holders on the top of the pressure washer (WPX3600 shown). Place the trigger handle and hose in their designated storage brackets.

INSTALL THE PUMP DIPSTICK

1. Temporary oil cap
2. Pump dipstick

See Figure 5.
This pressure washer ships with a temporary oil cap on the pump and should be removed and replaced with the pump dipstick. The oil level should be sufficient from the factory and appear at the level of the red dot on the sight glass.

• Be sure the pressure washer is on a stable, level surface.
• Locate the pump dipstick in the loose parts.
• Locate the temporary cap on the pump.
• Loosen and remove the temporary cap and discard.
• Insert the pump dipstick into the pump. Be careful not to crossthread. Do not overtighten.

OPERATION

CONNECTING THE LANCE TO THE SPRAY GUN

1. Spray Gun
2. Lance

See Figure 6.

• Push the lance into the spray gun and turn clockwise to tighten. Do not overtighten.
• Gently pull on the lance to be certain it is secured.

CONNECTING THE HIGH PRESSURE HOSE TO THE SPRAY GUN

1. Spray Gun
2. High Pressure Hose
3. Collar

See Figure 7.

• Pull the collar on the high pressure hose back and push the hose fitting firmly onto the spray gun.
• Screw the collar onto the spray gun and tighten securely.
  NOTE: Be careful not to damage the threads on the spray gun doing so could cause the gun to leak during use.
• Gently pull on the hose to be certain it is secured.

CONNECTING THE HIGH PRESSURE HOSE TO THE UNIT

1. High pressure hose
2. High pressure outlet

See Figure 8.

• Uncoil and straighten the high pressure hose to remove any bends or kinks.
• Pull the collar on the high pressure hose back and push the hose fitting firmly into the threaded outlet on the pressure washer.
• Screw the collar onto the outlet and tighten securely.
  NOTE: Be careful not to damage the threads on the outlet doing so could cause the unit to leak during use.
• Gently pull on the hose to be certain it is secured.

CONNECTING A GARDEN HOSE TO THE UNIT

1. Garden hose
2. Water inlet

NOTICE
Follow local regulations and ordinances when connecting your pressure washer to a water supply. Some jurisdictions may prohibit you from connecting directly to public drinking water in order to prevent the possibility of chemicals feeding back into the system. Connections made through a backflow preventer or receiver tank are generally permitted.

NOTICE
The water used in this device must come from a water main. DO NOT use this device with water from a lake, pool, pond, etc. NEVER use hot water with this product.

See Figure 9.

• Turn the water faucet completely off.
• Uncoil and straighten the garden hose to remove any bends or kinks.
• Flush water through the hose for several seconds to remove debris and then turn the faucet off again.
• Inspect the screen inside the water inlet for damage or clogs. Clean or replace as needed. NEVER connect a garden hose without the screen in place.
• Insert the garden hose into the water inlet.
• Thread the collar on the inlet onto the garden hose. Tighten securely.

NOTICE
ALWAYS turn the water supply "ON" before turning the pressure washer power to "ON". Running the pump dry of water will cause damage to the internal components and render the pressure washer inoperable.

OVERVIEW

This pressure washer can produce very high levels of water pressure and can be used for a variety cleaning applications such as cleaning decks and walkways, washing vehicles and equipement; and removing dirt from home exteriors and fences.

ADDING OIL/CHECKING OIL

1. Oil cap/dipstick
2. Hatched area

See Figure 10.

NOTICE
THIS UNIT HAS BEEN SHIPPED WITHOUT OIL. Do not attempt to crank or start engine before it has been properly serviced with recommended oil. Failure to add engine oil before starting will result in serious engine damage.

NOTICE
Use of 2-stroke/cycle oil or other unapproved oil types can cause severe engine damage that is not covered under warranty.

The included, recommended oil type for typical use is 10W-30 engine oil. If running the pressure washer in extreme temperatures, refer to the following chart.

• On a level surface, remove the oil dipstick.
  NOTE: There is an oil dipstick/filler neck on both sides of the unit. Either can be used to check or add oil.
• Using the supplied oil and funnel tip, add oil into oil filler neck.
  NOTE: As residual oil from the factory may remain in the engine, add the oil incrementally to prevent overfilling the engine. See Engine Oil Level Check in the Maintenance section.
• Replace the oil dipstick and hand-tighten.

GASOLINE REQUIREMENTS

NOTICE
Do not use E15 or E85 fuel in this product. Engine or equipment damage caused by stale fuel or the use of unapproved fuels (such as E15 or E85 ethanol blends) is not covered by warranty. Only use unleaded gasoline containing up to 10% ethanol.

• ALWAYS use CLEAN, FRESH, unleaded gasoline (87 – 93 octane) in this unit. NEVER use OLD, STALE, or CONTAMINATED gasoline.
• Up to 10% ethanol (gasohol) is acceptable (where available; non-ethanol fuel is recommended).
• DO NOT use E85 or E15.
• DO NOT use a gas oil mix.
• DO NOT modify the engine to run on alternate fuels.
• DO NOT fuel indoors.
• DO NOT create a spark or flame while fueling.

USING FUEL STABILIZER

Adding a fuel stabilizer (not included) extends the usable life of fuel and helps prevent deposits from forming that can clog the fuel system. Follow the manufacturer's instructions for use.
Always mix the correct amount of fuel stabilizer to gasoline in an approved gasoline container before fueling the pressure washer. Run the pressure washer for two minutes to allow the stabilizer to treat the entire fuel system.

ADDING GASOLINE

Fire and explosion hazard. Do not overfill fuel tank. Fill only to the bottom of the filler neck. Overfilling may cause fuel to spill onto engine causing a fire or explosion hazard.

Fire and explosion hazard. Never refuel the pressure washer while the engine is running. Always turn the engine off and allow the pressure washer to cool for two minutes before refueling.

Fire and explosion hazard. Never use a gasoline container, gasoline tank, or any other fuel item that is broken, cut, torn or damaged.

NOTICE
Only fill the tank from an approved gasoline container. Make sure the gasoline container is internally clean and in good condition to prevent fuel system contamination.

1. Fuel cap

1. Fuel cap
2. Screen filter
3. Maximum fuel level

See Figures 11 - 12.

• Turn the pressure washer OFF and allow to cool for a minimum of two minutes before fueling.
• Place the pressure washer on level ground in a well ventilated area.
• Clean area around fuel cap and remove the cap slowly.
• Slowly add the recommended fuel. Do not overfill. Fill only to the top of the fuel screen filter visible in the filler neck.
• Install the fuel cap and tighten until a click is heard.

NOTICE
Fuel can damage paint and plastic. Use caution when filling the fuel tank. Damage caused by spilled fuel is not covered under warranty.

NOTICE
Clean the fuel screen filter of debris before and after each fueling. Remove the fuel screen filter by slightly compressing it while removing it from the fuel tank.

UNIT LOCATION

Asphyxiation hazard. Never operate the pressure washer in an enclosed area. Engine exhaust contains carbon monoxide that can kill in minutes. Only operate the pressure washer outside and away from windows, doors and vents. Place the pressure washer in a well-ventilated area. DO NOT place the pressure washer near vents or intakes where exhaust fumes could be drawn into occupied or confined spaces. Carefully consider wind and air currents when positioning the pressure washer.

This pressure washer must have at least 5ft. (1.5m) of clearance from combustible material. Leave at least 3 ft. (0.91 m) of clearance on all sides of the pressure washer to allow for adequate cooling, maintenance, and servicing.

BEFORE STARTING THE ENGINE

Verify that:

• The pressure washer is placed in an appropriate location.
• The unit is on a dry, flat, and level surface.
• The engine is filled with oil.

STARTING THE ENGINE

Always wear safety goggles or safety glasses with side shields, and as necessary a full face shield as well as full ear protection when operating this product.

NOTICE
Running the unit for more than one minute without spraying water causes heat to build up in the pump. In the event that the pump gets too hot, a thermal relief valve will open to release the hot water. Running the unit without spraying water can damage pump components and will void the warranty.

1. Fuel lever
2. On
3. Off

1. Choke
2. Run
3. Start

1. Recoil handle
2. On/off switch

See Figures 13 - 15.

• Turn the water supply ON.
• Pull the trigger on the spray gun to purge all air from the pump and hose. This may take several minutes.
• Do not start the engine until a steady stream of water is flowing from the nozzle.
• Turn the engine switch to the ON position.
• Turn the fuel valve to the ON position.
• If the engine is cold, move the choke lever to the CHOKE position.
• Pull the starter cord slowly until resistance is felt and then pull rapidly.
  NOTE: If the engine starts briefly and then shuts off, squeeze the trigger on the spray gun to relieve the pressure before trying to start the engine again.
• Once the engine starts, move the choke lever to the RUN position. Allow the engine to warm up slightly before use.

STOPPING THE UNIT

During normal operation, use the following steps to stop the pressure washer:

• Engage the spray gun trigger lock in the safe position.
• Move the engine OFF/ON switch to the OFF position.
• Close the fuel valve.
• Turn the water supply OFF.
• Disengage the trigger lock and depress the trigger for 15 seconds to depressurize the system.
• Disconnect the garden hose from the water inlet.
• Complete all steps in the AFTER EACH USE section of this manual.

DURING AN EMERGENCY

If there is an emergency and the pressure washer must be stopped quickly, push the engine control switch to OFF position immediately.

USING THE SPRAY GUN

Hold the spray gun and lance with two hands (one hand to pull the trigger and the other to stabilize the gun) until you get used to the "recoil". Do not lose control of the spray gun doing so could result in injury to yourself and others.

1. Trigger
2. Safety Lock

See Figure 16.

• Start the pressure washer.
• Release the safety lock by pushing it down into the slot in the trigger.
• Squeeze and hold the trigger to start the flow of water.
• Release the trigger to stop the flow of water.
• Lock the trigger by pushing it up to its original position.
  NOTE: Squeeze the trigger to make sure its locked and will not move. ALWAYS keep the spray gun locked when it's not in use.

SELECTING NOZZLES

The quick-connect coupler on the spray lance allows changing between nozzles while the pressure washer is running.

Always engage the trigger lock before changing a nozzle.

NOTICE
Only use the nozzles that were supplied with the pressure washers. Using any other nozzles can affect performance and may void the warranty. For replacement nozzles call (855) 944-3571.

CHANGING THE NOZZLE

See Figure 17.
Pull back the quick-connect collar at the end of the spray lance. Insert the nozzle then release the collar. Pull on the nozzle to make sure it is secured.

1. Quick-connect collar
2. Nozzle

SPRAYING TIPS

For most cleaning, keep nozzle 8 - 24 in. (20 - 61 cm) away from cleaning surface.

• Damage may occur to the cleaning surface if you spray too close, especially with high-pressure nozzles.
• When beginning to spray, start farther away and move closer to avoid damage to the surface.
• To prevent damage to tires, allow at least 6 in. (15 cm) between a tire and the nozzle.

DETERGENT USE

1. Cleaning solution
2. Detergent tank
3. Siphon hose
4. Detergent bottle

See Figure 18.
The use of detergents can dramatically reduce cleaning time and assist in the removal of difficult stains. Many detergents are customized for pressure washer use for specific cleaning tasks. When spraying detergent, the detergent will be diluted 1:12. Approximately 621 ml (21 oz.) of detergent will be consumed from the tank for every minute sprayed.

NOTICE
Only use detergents designed for pressure washers. Pressure washer detergents are as thick as water. Using thicker detergents, like dish soap, will clog the chemical injection system. Do not use household detergents, acids, alkalines, bleaches, solvents, flammable material, or industrial grade solutions, which can damage the pump or cause property damage.

Prepare cleaning solution as instructed on the solution bottle. Always test in an inconspicuous area before beginning. You can effectively clean surfaces by combining the chemical action of detergents with high pressure rinses. On vertical surfaces, apply the detergent starting at the bottom and work your way upward. This method prevents the detergent from sliding down and causing streaks. Begin high pressure rinsing at the bottom and work your way upward. On particularly tough stains, use a brush in combination with detergents and high pressure rinsing.

• For WPX3600 and WPX3800, fill the detergent tank with cleaning solution.
• For WPX4400, attach the siphon hose to the connector on the pressure washer. Insert the siphon hose into the bottle of cleaning solution.
• Install the detergent nozzle (black) in the spray lance. Detergent will only be drawn through the pump when the black detergent nozzle is attached to the end of the spray lance.
• Make sure the water supply is ON. Start the engine. Pull the trigger to spray the detergent solution.

NOTICE
NEVER use bleach in detergent tank. It will damage the pump and void the warranty.

• Use long, even overlapping strokes to apply soap. Allow 3 to 5 minutes for the soap to soak in before rinsing. Do not allow the soap to dry on the surface before rinsing.
  Reapply soap if necessary to maintain a wet surface for the soap to soak in.

DETERGENT SYSTEM FLUSH

The detergent suction system can be flushed by removing the suction tube from the detergent tank or bottle and placing the tube in a fresh bucket of water. On the WPX3600 and WPX3800, only perform a system flush when the detergent tank is empty.

• For WPX3600 and WPX3800, with the water supply ON, the black nozzle connected to the spray gun lance, and the engine running, disconnect the suction tube from the bottom of the detergent tank.
• For WPX4400, with the water supply ON, the black nozzle connected to the spray gun lance, and the engine running, remove the siphon hose from the bottle of detergent.
• Place the suction tube in a clean bucket of water, disengage the trigger lock, then depress the spray gun trigger to flush the system.
• For WPX3600 and WPX3800, engage the trigger lock then reinstall the suction tube on the detergent tank.

AFTER EACH USE

• Lock the spray gun trigger.
• Turn the engine OFF, then turn the water supply OFF.
• Disengage the trigger lock and depress the trigger for 15 seconds to depressurize the system.
• Let the pressure washer cool down.
• Disconnect the high-pressure hose and water inlet hose.
• Drain the hoses, spray gun, and nozzle extension.
• Engage the trigger lock on the spray gun
• Wipe off all remaining water with a clean, dry rag.
• While the pressure washer is turned off, pull the recoil handle 5 to 6 times. This should remove most of the remaining liquid inside the pump.
• Store the pressure washer in a clean, dry place.

TRANSPORTING

Weight hazard. Always have assistance when lifting the pressure washer.

• Allow the pressure washer to cool a minimum of 30 minutes before transporting.
• Only use the pressure washer's fixed frame to lift the unit or attach any load restraints such as ropes or tiedown straps. Do not attempt to lift or secure the pressure washer by holding onto any of its other components.
• Keep the unit level during transport to minimize the possibility of fuel leakage or, if possible, drain the fuel or run the engine until the fuel tank is empty before transport.
• The pressure washer wheels are only intended for hand transport. The wheels are not suitable for towing the pressure washer either on or off-road.

Fire hazard. Do not up-end the pressure washer or place it on its side. Fuel or oil can leak and damage to the pressure washer may occur.

After 100 Hours or Every Season

Inspect/clean spark arrestor

Inspect/clean spark plug

Inspect/adjust valve clearance*

After 300 Hours

Replace spark plug

Replace air filter

MAINTENANCE

MAINTENANCE SCHEDULE

Disconnect the spark plug boot from the spark plug when performing maintenance on the pressure washer.

Regular maintenance will improve performance and extend the service life of the pressure washer. Follow the hourly or calendar intervals, whichever occurs first. More frequent service is required when operating in adverse conditions as noted below.

Before Each Use

Check engine and pump oil

Check water inlet screen and gasket

Clean around air intake and muffler

After First 5 Hours

Change engine oil

After First 20 Hours

Change pump oil

After 50 Hours or Every Season

Clean air filter

Change engine oil if operating under heavy load or in hot environments

Clean spark arrestor

After 100 Hours or Every Season

Inspect/clean spark arrestor

Inspect/clean spark plug

Inspect/adjust valve clearance*

After 300 Hours

Replace spark plug

Replace air filter

* Recommend service to be performed by authorized Westinghouse service dealer.

CLEANING THE PRODUCT

DO NOT spray the pressure washer with water. Water can contaminate the fuel system and can enter the engine through the cooling slots and damage the engine.

• Use a damp cloth to clean exterior surfaces of the pressure washer.
• Use a soft bristle brush to remove dirt and oil.
• Use an air compressor (25 PSI) to clear dirt and debris from the pressure washer.
• Inspect all air vents and cooling slots to ensure that they are clean and unobstructed.

CLEANING SPRAY NOZZLES

See Figure 19.
Detach the nozzle from the spray lance. Use the included nozzle cleaning tool to loosen any particles in the nozzle. Flush with water.

1. Nozzle cleaning tool
2. Nozzle

CLEANING THE AIR FILTER

Fire hazard. Never use gasoline or other flammable solvents to clean the air filter.

1. Air filter
2. Air filter assembly
3. Wingnut

See Figure 20.
The air filter must be cleaned after every 50 hours of use or six months (frequency should be increased if the pressure washer is operated in a dusty environment).

• Place the pressure washer on a level surface and allow the engine to cool for several minutes.
• Use your fingers to unscrew the thumb screw on top of the air filter assembly. Remove the wing nut, then remove the air filter.
• Use compressed air to clean the air filter from the inside out.

NOTE: The outer foam air filter element is not intended to be removed. If torn, replace the air filter.

ENGINE OIL LEVEL CHECK

Avoid skin contact with engine oil. Wear protective clothing and equipment. Wash all exposed skin with soap and water.

NOTICE
Always use the specified engine oil. Failure to use the specified engine oil can cause accelerated wear and/or shorten the life of the engine.

1. Oil cap/dipstick
2. Drain hole
3. Oil drain bolt

See Figure 21.
When using the pressure washer under extreme, dirty, dusty conditions or in extremely hot weather, change the oil more frequently.
Ambient air temperature will affect engine oil performance. Change the type of engine oil used based on weather conditions.

Check the engine oil level before each use.

• Place the pressure washer on a level surface and allow the engine to cool for several minutes.
• With a damp rag, clean around the oil dipstick.
  NOTE: There is an oil dipstick/filler neck on both sides of the unit. Either can be used to check or add oil.
• Remove the oil dipstick and wipe the dipstick clean.
• Screw the dipstick fully into the oil filler neck. Remove the dipstick and verify that the oil level is within safe operating range.
• If low, add recommended engine oil incrementally and recheck until the level is between the L and H marks on the dipstick. DO NOT overfill. If over the full mark (H) on the dipstick, drain the oil to reduce the oil level to the full mark.
• Replace the oil dipstick and hand-tighten.

ENGINE OIL CHANGE

See Figure 21.
When using the pressure washer under extreme, dirty, dusty conditions or in extremely hot weather, change the oil more frequently. Change the oil while the engine is still warm from operation.

• Place the pressure washer on a level surface and allow the engine to cool for several minutes.
• With a damp rag, clean around the oil dipstick. Remove the dipstick and wipe clean.
• Place an oil pan (or suitable container) under the oil drain bolt.
• Using a 10 mm wrench, remove the oil drain bolt and allow the oil the to drain.
• Install the oil drain bolt and tighten securely.
• Slowly pour oil into the oil filler neck until oil the level is between the L and H marks on the dipstick. Stop frequently to check the oil level. DO NOT overfill.
  Maximum oil capacity: 20 Oz. (0.6 Liter)
• Install the oil dipstick and hand-tighten

NOTICE
Do not pollute. Follow the guidelines of the EPA or other governmental agencies for proper disposal of hazardous materials. Consult local authorities or reclamation facility.

PUMP OIL CHANGE

1. Oil pump drain bolt
2. Oil pump dipstick

See Figure 22.
After 20 hours of use, change the oil in the water pump. The oil should be changed once a year after. When replacing the pump oil, use only SAE85W-90.

NOTE: The oil capacity of these units is approximately 230 to 250 ml.

• Place a container under the pump to catch the used oil.
• Loosen and remove the hex socket drain bolt (8 mm in the WPX3600/3800; and 17 mm in the WPX4400. Socket is not included.)
• Allow the oil to drain completely into the container.
• Replace the socket drain bolt and tighten firmly. Do not cross thread.
• Fill the oil to the red mark located in the oil detection window.

SPARK PLUG MAINTENANCE

1. Spark plug
2. Spark plug cap

See Figure 23.
Inspect and clean the spark plug after every 100 hours of use or six months. Replace the spark plug after 300 hours of use or every year.

• Place the pressure washer on a level surface and allow the engine to cool.
• Remove the spark plug boot by firmly pulling the spark boot directly away from the engine.
• Clean the area around the spark plug.
• Remove the spark plug with the included spark plug socket wrench.

NOTICE
Never apply any side load or move the spark plug laterally when removing the spark plug.

• Inspect the spark plug. Replace if electrodes are pitted, burned, or the insulator is cracked. Only use a recommended replacement plug.

Recommended Spark Plug Replacement
Westinghouse Model Number	Torch	NGK
WPX3600/3800/4400	F7TC	BP7ES

• Measure the spark plug electrode gap with a wire-type feeler gauge. If necessary, correct the gap by carefully bending the side electrode.
  Spark plug gap: 0.024 – 0.032 in. (0.60 – 0.80 mm)
• Carefully install the spark plug finger tight, then tighten as additional 3/8 to 1/2 turn with the spark plug wrench.
• Attach the spark plug boot.

SPARK ARRESTOR SERVICE

1. Spark arrestor
2. Screen
3. Bracket
4. Screws

1. Screen

See Figures 24 - 25.
Allow the muffler to cool completely before servicing the spark arrestor. Check and clean the spark arrestor after every 100 hours of use or every season. Failure to clean the spark arrestor will result in degraded engine performance.

• Place the pressure washer on a level surface.
• Carefully remove the carbon deposits from the spark arrestor screen with a wire brush. The spark arrestor must be free of breaks and tears. Replace the spark arrestor if damaged.

DRAINING THE FLOAT BOWL

1. Carburetor
2. Drain screw

See Figure 26.

• Turn the fuel tank valve to the OFF position.
• Locate the drain screw on the bottom of the carburetor float bowl.
• Place an appropriate gasoline container under the drain screw to catch the drained fuel.
• Loosen the float bowl drain screw and allow the fuel to drain. Tighten the float bowl drain screw.

DRAINING THE FUEL TANK

1. Fuel cap
2. Siphon
3. Spark plug

See Figure 27.
If storing the pressure washer for longer than six months, drain the fuel tank to prevent fuel separation, deterioration, and deposits in the fuel system.

• Drain the float bowl.
• Unscrew the fuel tank cap. Remove the fuel screen filter by slightly compressing it while removing it from the tank.
• Using a commercially available gasoline hand pump (not included), siphon the gasoline from the fuel tank into an approved gasoline container. DO NOT use an electric pump.
• Reinstall the fuel screen filter and the fuel tank cap.
• Remove the spark plug.
• Put a teaspoon of engine oil into the cylinder and pull the recoil handle until resistance is felt. At this position the piston is coming up on its compression stroke and both valves are closed. Storing the engine in this position will help prevent internal corrosion. Return the recoil handle gently.
• Reinstall the spark plug. Leave the spark plug boot disconnected to prevent accidental starting.

VALVE CLEARANCE

NOTICE
Checking and adjusting valve clearance must be done when the engine is cold.

1. Gasket
2. Rocker arm cover
3. Bolts

1. Adjustment screw
2. Jam nut
3. Feeler gauge
4. Rocker arm
5. Valve stem
6. Push rod

See Figures 28 - 29.

• Remove the rocker arm cover and carefully remove the gasket. If the gasket is torn or damaged, it must be replaced.
• Remove the spark plug so the engine can be rotated more easily.
• Rotate the engine to top dead center (TDC) by pulling the recoil handle slowly. Looking through the spark plug hole, the piston should be at the top (both valves are closed).
• Both the rocker arms should be loose at TDC on the compression stroke. If they are not, rotate the engine 360°.
• Insert a feeler gauge between the rocker arm and the valve stem to measure valve clearance.

	Intake Valve	Exhaust Valve
Valve Clearance	0.0031 – 0.0047 in (0.08 – 0.12 mm)	0.0051 – 0.0067 in (0.13 – 0.17 mm)
Torque	8-12 N•m	8-12 N•m

• If an adjustment is necessary, hold the rocker arm pivot and loosen the pivot adjusting nut.
• Turn the rocker arm pivot to obtain the specified clearance. Hold the rocker arm pivot and re-tighten the pivot adjusting nut to the specified torque.
  Torque: 106 inch-pound (12 N•m)
• Perform this procedure for the other valve.
• Install the gasket, rocker arm cover, and spark plug.

INSTALL HANDLE FOR STORAGE

1. Handle
2. Lower Frame
3. Bolt
4. Handle Knob

See Figure 30.

• Remove the knob and bolt.
• Reverse the handle so it is facing toward the pressure washer. ReInstall on the lower frame.
• Insert the bolt through the frame and secure with the handle knob.

STORAGE

Proper storage preparation is required for trouble-free operation and pressure washer longevity.

NOTICE
Gasoline stored for as little as 30 days can deteriorate, causing gum, varnish, and corrosive buildup in fuel lines, fuel passages, and the engine. This corrosive buildup restricts the flow of fuel, which can prevent the engine from starting after a prolonged storage period. The use of fuel stabilizer significantly increases the storage life of gasoline. Full-time use of fuel stabilizer is recommended. Follow the manufacturer's instructions for use.

Never store a pressure washer with fuel in the tank indoors or in a poorly ventilated area where the fumes can come in contact with an ignition source such as a pilot light of a stove, water heater, clothes dryer, or any other gas appliance, or a spark from an electric appliance.

STORAGE TIME	RECOMMENDED PROCEDURE
Less than 1 month	No service required.
2 to 6 months	Fill with fresh gasoline and add gasoline stabilizer. Drain the carburetor float bowl.
6 months or longer	Drain the fuel tank and carburetor float bowl.

STORED FOR LESS THAN 30 DAYS

• Allow the pressure washer to cool a minimum of 30 minutes before storage.
• Wipe the pressure washer with a moist cloth. Clean any debris from the muffler cooling vents.
• Store the pressure washer in a well-ventilated, clean, dry location away from sparks, open flames, pilot lights, heat, and other sources of ignition such as areas with a spark-producing electric motor or where power tools are operated. Store in an area out of direct sunlight.
• Do not store the pressure washer or gasoline near furnaces, water heaters, or any other appliances that produce heat or have automatic ignitions.

STORED FOR OVER 30 DAYS

Even properly stabilized fuel can leave residue and cause corrosion if left long term. If storing the pressure washer for two to six months, drain the float bowl to prevent gum and varnish buildup in the carburetor.

WINTER STORAGE

Make sure the pressure washer hose is free of all water before storing for winter. In order to prevent corrosion and keep the water pump from freezing you will need to add RV (non-toxic) antifreeze or similar pump-protection specifically made for pressure washers. Follow the manufacturer's instructions for use.

TROUBLESHOOTING

PROBLEM	POSSIBLE CAUSE	CORRECTION
Engine will not start	Fuel valve in OFF position.	Turn fuel valve to ON position.
	No fuel.	Add fuel.
	Choke in wrong position.	Adjust choke.
	Spark plug wire loose.	Attach spark plug boot.
	Faulty spark plug.	Replace spark plug.
	Stale fuel or water in fuel.	Drain fuel and replace with fresh fuel.
	Dirty air filter.	Clean or replace are filter.
Engine suddenly stops	Out of fuel.	Add fuel.
	Low oil.	Check oil and add if low.
Engine runs erratically	Choke in wrong position.	Adjust choke.
	Low oil.	Check oil and add if low.
	Stale fuel or water in fuel.	Drain fuel and replace with fresh fuel.
	Faulty spark plug.	Replace spark plug.
Unit does not reach high pressure	Water supply restricted.	Check hoses for leaks, blockages, kinks.
	Garden hose too small.	Use 5/8 in. (0.025 mm) hose or larger.
	Not enough inlet water.	Turn garden hose water supply fully ON. Check hoses for leaks, blockages, kinks.
Spray pressure varies	Poor inlet water supply.
	Garden hose inlet filter is clogged.	Remove garden hose, clean filter.
	Spray nozzle is restricted.	Remove particles with nozzle cleaning tool.
	Air ingress to pump.	Check all hoses and fittings for secure connections. With water supply ON, turn engine OFF and purge pump of air by depressing trigger until a steady stream of water flows.
Cannot pull recoil starter handle	Pump pressure.	Depress spray gun trigger to relieve pressure.
Low pressure detergent wash not working	Wrong nozzle installed on spray lance.	Detergent only works with black (low pressure) nozzle installed. Install black nozzle. If missing, replace.
	Detergent is too thick.	Use detergent made specifically for pressure washer use.
	Detergent hose is not connected to the pump.	Check hose connections.
	Spray nozzle is obstructed.	Clean nozzle of debris.
	Detergent hose is clogged.	Remove detergent hose and clean. Replace.
	Blockage inside pump detergent valve.	Quickly depress and release spray gun trigger 4-5 times to clear the detergent valve.
Garden hose connection leaks	Loose fittings.	Tighten fittings.
	Missing/worn rubber washer.	Check hose and pump water inlet washers. Replace if missing/worn.
Spray gun lance leaks	Loose fittings.	Check for worn O-rings or loose connections.
	Missing/worn rubber washers.	Remove spray lance and/or high pressure hose. Check and replace washers if necessary.

SAFETY

SAFETY DEFINITIONS

The words DANGER, WARNING, CAUTION, and NOTICE are used throughout this manual to highlight important information. Make sure that the meanings of this safety information is known to all who operate, perform maintenance on, or are near the generator.

This safety alert symbol appears with most safety statements. It means attention, become alert, your safety is involved! Please read and abide by the message that follows the safety alerts symbol.

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

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

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE
Indicates a situation which can cause damage to the generator, personal property, and/or the environment, or cause the equipment to operate improperly.

NOTE: Indicates a procedure, practice or condition that should be followed for the generator to function in the manner intended.

SAFETY SYMBOLS

Follow all safety information contained in this user's manual as well as the information on the product labeling.

SYMBOL	DESCRIPTION
	Safety Alert Symbol
	Electrocution Hazard
	Asphyxiation Hazard
	Burn Hazard. Do not touch hot surfaces.
	Electrical Shock Hazard
	Fire Hazard
	Maintain Safe Distance
	Injection Risk. Do not direct water stream at people or pets.
	Kickback. Hold spray gun securely
	Lifting Hazard
	Wear eye and ear protection

CARBON MONOXIDE – using this product indoors CAN KILL YOU IN MINUTES. Operate this product outdoors only in a well ventilated area.
DO NOT operate the product inside any building, including garages, basements, crawlspaces and sheds, enclosure, or compartment. DO NOT allow exhaust fumes to enter a confined area through windows, doors, vents, or other openings.

FUEL SAFETY

Fire and explosion hazard. Gasoline is highly explosive and flammable and can cause severe burns or death.

• In case of a gas fire, do not attempt to extinguish the flame if the fuel tank valve is in the ON position. Introducing an extinguisher to a pressure washer with an open fuel valve could create an explosion hazard.
• Gas has a distinctive odor, this will help detect potential leaks quickly.
• Gas vapors can cause a fire if ignited.
• Gasoline is a skin irritant and needs to be cleaned up immediately if it comes in contact with the skin.
• Gasoline and gasoline vapors are extremely flammable and explosive under certain conditions.
• ALWAYS refuel the pressure washer outdoors, in a well-ventilated area.
• NEVER remove the fuel cap with the engine running.
• NEVER refuel the pressure washer while the engine is running. Always turn the engine off and allow the pressure washer to cool for at least two minutes before refueling.
• Only fill fuel tank with gasoline.
• Keep sparks, open flames or other form of ignition (such as match, cigarette, static electric source) away when refueling.
• NEVER overfill the fuel tank. Leave room for fuel to expand. Overfilling the fuel tank can result in a sudden overflow of gasoline and result in spilled gasoline coming in contact with HOT surfaces.
• Spilled fuel can ignite. If fuel is spilled on the pressure washer, wipe up any spills immediately. Dispose of rag properly. Allow area of spilled fuel to dry before operating the pressure washer.
• Wear eye protection while refueling.
• NEVER use gasoline as a cleaning agent.
• Store any containers containing gasoline in a well-ventilated area, away from any combustibles or source of ignition.
• Check for fuel leaks after refueling.
• Never operate the engine if a fuel leak is discovered.
• Store fuel in a container approved for gasoline.
• Do not smoke when filling the pressure washer with gasoline.
• Do not allow the gas tank to overflow when filling.
• Shut down the engine and allow it to cool for two minutes before adding gasoline or oil to the pressure washer.
• Wipe spilled fuel from the unit.
• Never attempt to burn off spilled fuel.
• Store any containers containing gasoline in a well-ventilated area, away from any combustibles or source of ignition.

GENERAL SAFETY PRECAUTIONS

• Do not operate when you are tired or under the influence of drugs, alcohol, or medication.
• Always wear safety goggles or safety glasses with side shields, and as necessary a full face shield as well as full ear protection when operating this product.
• If you begin to feel sick, dizzy, or weak while using the pressure washer, move to fresh air IMMEDIATELY. See a doctor, as you can have carbon monoxide poisoning.
• Only use OUTSIDE and far away from windows, doors, and vents as recommended by the US Department of Health and Human Services Centers for Disease Control and Prevention. Your specific home and/or wind conditions may require additional distance.
• 
  While operating and storing, keep at least five feet of clearance on all sides of pressure washer, including overhead. Allow the pressure washer to cool a minimum of 30 minutes before storage. Heat created by the muffler and exhaust gases could be hot enough to cause serious burns and/or ignite combustible objects.
• 
  Do not touch the muffler or engine. They are very HOT and will cause severe burns. Do not put body parts or any flammable or combustible materials in the direct path of the exhaust.
• Always remove any tools or other service equipment used during maintenance away from the unit before operating.
• Avoid skin contact with engine oil or gasoline. Wear protective clothing and equipment. Wash all exposed skin with soap and water.

Risk of injection or injury. High pressure jets can be dangerous if subject to misuse. DO NOT direct discharge stream at persons, animals, electrical devices, or the machine itself. ALWAYS point spray gun in safe direction. Every time you stop the engine, depress the spray gun trigger to relieve pressure.

NEVER spray flammable liquids or use pressure washer in areas containing combustible dust, liquids, or vapor. NEVER operate this machine in a closed building or in or near an explosive environment.

• The wheels are only intended for hand transport. The wheels are not suitable for towing the pressure washer either on or off-road.

Contact with electrical power source can cause electric shock or burn. NEVER spray in the direction of or near a power source/electrical outlet.

• NEVER disconnect the high pressure discharge hose from the machine while the system is pressurized.
• DO NOT let water in the pump freeze. See Storage section in the manual for instructions regarding winter storage.
• If water has frozen in the pressure washer, thaw the pressure washer in a warm room before starting.
• Use the pressure washer only for intended uses.
• Operate only on level surfaces.
• DO NOT expose pressure washer to excessive moisture, dust, or dirt.
• DO NOT allow any material to block the cooling slots.
• DO NOT use the pressure washer if the unit sparks, smokes, emits flames, or vibrates excessively.

When starting the pressure washer:

• NEVER run the unit dry. Be sure the water supply is completely turned on before operating the unit.
• DO NOT pour hot water on or into the pump; internal parts will be damaged and your warranty will be voided. ONLY use cold water.
• Use only on a level surface.
• Make sure there is proper drainage to dissipate water.
• Make sure that the fuel cap, air filter, spark plug, fuel lines, and exhaust system are properly in place.
• If you spill any gasoline on the tank, allow it to fully evaporate before operating.

When transporting or servicing the pressure washer:

• Disconnect the spark boot to prevent accidental starting.

When storing the pressure washer:

• Store away from sparks, open flames, pilot lights, heat, and other sources of ignition.
• Do not store gasoline near furnaces, water heaters, or any other appliances that produce heat or have automatic ignitions.

NOTICE
Water under high pressure can damage fragile surfaces. ALWAYS practice on a inconspicuous test area to understand when damage may occur.

Use of pressure washers can create wet walking surfaces. While using a pressure washer, forces from the gun can cause you to loose footing and fall.

High pressure spray can splash back at operator or propel objects.

• NEVER allow children to operate any pressure washer or play nearby.
• NEVER leave spray gun unattended while machine is running or until after engine has been turned off and pressure has been relieved from the spray gun.
• NEVER repair high pressure hose, replace it.
• NEVER repair leaking connections with sealant, replace damaged O-rings.
• NEVER use spray gun with a damaged or altered trigger lock.
• NEVER: secure the trigger in the open / spray position.
• ALWAYS keep high pressure hose connected to spray gun and pump while in use.
• ALWAYS make sure that the spray gun nozzle is properly attached to the lance.
• ALWAYS wear safety goggles when operating this equipment. Safety goggles cover the sides, top and bottom of the eyes. Don't confuse safety glasses for goggles.
• Use only on a level surface.
• DO NOT use on elevated surface where kickback could result in a serious fall.
• ALWAYS grasp the gun with two hands to prevent potential injury do to the high pressure from the gun.

www.WestinghouseOutdoorPower.com
Service Hotline (855) 944-3571
777 Manor Park Drive, Columbus, OH 43228

Documents / Resources

References

• http://www.p65warnings.ca.gov
• Westinghouse Outdoor Power Equipment | Westinghouse Outdoor Equipment
• Warranty Registration | Westinghouse Outdoor Equipment

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