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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:
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
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.
Weight hazard. Always have assistance when lifting the pressure washer.
CARTON CONTENTS | |
Item | Quantity |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 5 |
| 1 |
| 1 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
If any parts are missing, contact our service team at service@wpowereq.com or call 1-855-944-3571.
See Figure 2.
See Figure 3.
Connect the spray gun holder and the high pressure hoseholder on the handle using a wrench and the supplied bolts.
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.
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.
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.
See Figure 6.
See Figure 7.
See Figure 8.
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.
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.
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.
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.
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.
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.
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.
See Figures 11 - 12.
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.
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.
Verify that:
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.
See Figures 13 - 15.
During normal operation, use the following steps to stop the pressure washer:
If there is an emergency and the pressure washer must be stopped quickly, push the engine control switch to OFF position immediately.
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.
See Figure 16.
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.
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.
For most cleaning, keep nozzle 8 - 24 in. (20 - 61 cm) away from cleaning surface.
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.
NOTICE
NEVER use bleach in detergent tank. It will damage the pump and void the warranty.
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.
Weight hazard. Always have assistance when lifting the pressure washer.
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 |
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.
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.
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.
Fire hazard. Never use gasoline or other flammable solvents to clean the air filter.
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).
NOTE: The outer foam air filter element is not intended to be removed. If torn, replace the air filter.
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.
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.
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.
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.
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.
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.
NOTICE
Never apply any side load or move the spark plug laterally when removing the spark plug.
Recommended Spark Plug Replacement | ||
Westinghouse Model Number | Torch | NGK |
WPX3600/3800/4400 | F7TC | BP7ES |
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.
See Figure 26.
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.
NOTICE
Checking and adjusting valve clearance must be done when the engine is cold.
See Figures 28 - 29.
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 |
See Figure 30.
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. |
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.
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.
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. |
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.
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.
Fire and explosion hazard. Gasoline is highly explosive and flammable and can cause severe burns or death.
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.
Contact with electrical power source can cause electric shock or burn. NEVER spray in the direction of or near a power source/electrical outlet.
When starting the pressure washer:
When transporting or servicing the pressure washer:
When storing the pressure washer:
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.
www.WestinghouseOutdoorPower.com
Service Hotline (855) 944-3571
777 Manor Park Drive, Columbus, OH 43228
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download Westinghouse WPX3600, WPX3800, WPX4400 - Pressure Washer Manual
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