How to Start a Pressure Washer, Gas or Electric

On this page (9 sections)

1. What should you check before starting a pressure washer?
2. How do you start a gas pressure washer?
3. How do you start an electric pressure washer?
4. What should you do if the gas engine won’t start?
5. What should you do if an electric washer won’t start?
6. How do you shut down and care for a pressure washer?
7. Which pressure washer fits your setup and routine?
8. What mistakes should you avoid when starting a pressure washer?
9. How to start a pressure washer: which type should you choose?

To learn how to start a pressure washer, connect the water, clear air from the pump, and follow the steps for its power source. Gas models need an engine start sequence, while electric models need water flow and a suitable power connection.

Read the owner’s manual before the first start because controls and instructions vary. Keep the spray tip pointed away from people, pets, windows, and surfaces that could be damaged.

What should you check before starting a pressure washer?

Before starting, set the washer on stable ground, inspect its connections, and turn on the water. Keep the work area clear, wear eye protection and sturdy footwear, and follow the manual’s safety directions.

Check the high-pressure hose, spray gun, wand, and nozzle for damage or loose connections. Attach the garden hose to the water inlet and turn on the tap fully.

If your model needs a spray tip attached before startup, use the one recommended for the job. Keep the trigger lock on until you’re ready to control the spray.

Our guide to how to use a pressure washer covers nozzle choice, safe spray distance, and cleaning technique.

Why do you need to clear air from the pump?

Clearing air helps water flow through the pump before it runs. With the washer off, squeeze the spray gun trigger until water comes out in a steady stream.

This also gives you a chance to check for leaks at the hose and gun connections. If water doesn’t flow, check the tap, hose, inlet screen, and connections before starting the washer.

How do you start a gas pressure washer?

To start a gas pressure washer, connect water, clear the pump, and use the engine controls in the order shown in the manual. Run the engine outdoors on level ground.

Before each start, check the oil and fuel as the manufacturer directs. Never run a gas engine indoors or in an enclosed space because its exhaust can be dangerous.

Use this general sequence, adjusting it to match your model:

1. Place the washer outdoors on a level, stable surface.
2. Check engine oil and fuel as directed in the manual.
3. Connect the garden hose and turn on the water.
4. Squeeze the spray gun trigger until water flows steadily.
5. Set the fuel valve, choke, and engine switch as instructed.
6. Pull the starter handle, then move the choke as directed once the engine warms.

Don’t pull the starter before water reaches the pump. If the engine doesn’t start after a few attempts, stop and use the manual’s troubleshooting steps instead of repeatedly pulling the cord.

What do the choke and fuel valve do?

The choke helps a cold engine start by changing the air and fuel mixture. The fuel valve controls fuel flow, but its position and the start sequence vary by washer.

Once the engine runs smoothly, move the choke to its operating position as directed. Don’t guess at a control that differs from the manual’s instructions.

Which gas washer has a recoil starter?

The Westinghouse WPX2700 has a recoil-start 212cc, four-stroke engine and includes a quick-start guide, engine oil, and tools. It suits homeowners who want a gas washer for outdoor cleaning and are comfortable handling fuel and routine engine checks.

Skip this type if you want to avoid engine upkeep or need to work where gas exhaust is unsuitable. Compare other gas pressure washers for homeowners if you want a different gas option.

How do you start an electric pressure washer?

To start an electric pressure washer, connect water and clear the pump before connecting power and switching it on. Follow the manual’s instructions for the outlet and any extension cord.

Keep electrical connections dry and use only a suitable grounded outlet as directed. Don’t handle the plug or outlet with wet hands, and don’t use a damaged cord.

After connecting the washer, use its power switch or trigger-based start system. On some models, squeezing the spray gun trigger starts the pump.

Electric suits you if you can work near a suitable outlet and want to skip engine fuel and oil checks. For help comparing options, see our guide to electric pressure washers.

Does an electric pressure washer run continuously?

Some electric washers stop the pump when you release the trigger. The Westinghouse ePX3100 has this feature, along with four quick-lock wheels, a 25 ft hose, and an onboard soap tank.

Its 19 lb weight and compact size suit storage and moving around the home. Skip it if your work area lacks a suitable outlet or you need a gas-powered washer.

What should you do if the gas engine won’t start?

If a gas washer won’t start, stop and check fuel, oil, the switch, choke, and water setup against the manual. Let the engine cool before inspecting it.

Confirm that the engine switch is on and the fuel valve is open, if your model has those controls. Check the choke position for a cold start and repeat the prescribed sequence.

Don’t keep pulling the starter if you smell spilled fuel, see a leak, or hear an unusual sound. Turn the washer off and address the issue before trying again.

For a step-by-step fault check, read why a pressure washer won’t start.

What should you do if an electric washer won’t start?

If an electric washer won’t start, check the outlet, plug, water supply, and reset controls listed in its manual. Keep your hands and electrical connections dry.

Make sure the outlet works and the plug is firmly connected. If the washer has a reset or circuit-breaker button, use it only as the manual instructs.

Then check that water flows through the pump and the spray gun trigger moves freely. If the washer trips the circuit again or the cord is damaged, stop using it and contact the manufacturer or a qualified repair service.

How do you shut down and care for a pressure washer?

To shut down, turn off the washer, disconnect its power source, close the water supply, and release pressure from the hose. Follow the manual’s order because controls vary.

For an electric model, switch it off and unplug it by holding the plug, not pulling the cord. For a gas model, switch off the engine and close the fuel valve if instructed.

Turn off the tap and squeeze the spray gun trigger to relieve pressure before disconnecting hoses. Allow hot engine parts to cool before storing a gas washer.

After use, check hoses and connections for damage, and store the washer as its manual directs. If it will sit unused in freezing weather, read how to winterize a pressure washer.

Which pressure washer fits your setup and routine?

Choose gas if you need more freedom from outlet placement and are ready for engine checks; choose electric if an outlet is close and you want to avoid fuel. Both need water connected before startup.

The DeWalt DXPW3300-S suits homeowners who want a gas washer with a 208cc engine described as easy to start, plus five quick-connect nozzles. Its 25 ft hose and pneumatic tires support moving it around outdoor jobs.

Skip it if you don’t want to manage gas, oil, and engine controls. For a broader comparison of setup and power needs, see electric vs. gas pressure washers.

What mistakes should you avoid when starting a pressure washer?

The most common startup mistakes are running the pump without water, using the wrong engine sequence, and overlooking leaks or damaged electrical parts. A short setup check helps prevent avoidable trouble.

Don’t start a gas washer indoors, pull its starter before water reaches the pump, or guess at choke and fuel-valve positions. With electric models, keep plugs and connections dry and use a suitable outlet.

Don’t point the spray at people, pets, windows, or delicate surfaces while checking the machine. If the washer behaves differently from the manual’s description, switch it off and troubleshoot before continuing.

How to start a pressure washer: which type should you choose?

When deciding how to start a pressure washer, choose the type that fits your power access and care routine. Pick gas if you’re comfortable checking fuel and oil; pick electric if you can work near a suitable outlet and want simpler startup.

For either type, connect water and clear air from the pump before starting. Use the manual’s sequence, then follow our beginner’s guide to using a pressure washer for safe cleaning after startup.

Frequently asked questions

Should the water be on before starting a pressure washer?

Yes. Connect the garden hose and turn on the water before starting the engine or switching on an electric washer.

Squeeze the spray gun trigger with the washer off until water flows steadily, which clears air from the pump.

Then release it and follow the washer’s manual.

How do you start a gas pressure washer?

Set the washer outdoors on level ground, then check oil and fuel as the manual directs. Connect water, clear air from the pump through the spray gun, set the fuel valve, choke, and engine switch as instructed, then pull the starter.

Move the choke to its operating position as the engine warms.

How do you start an electric pressure washer?

Connect the garden hose and spray gun, turn on the water, and squeeze the trigger until the flow is steady. Connect the washer to a suitable grounded outlet using the manual’s electrical instructions, then switch it on or use its trigger-based start system.

Why does my pressure washer stop when I release the trigger?

Many electric pressure washers stop the pump when you release the trigger. This can be normal and may help conserve energy and reduce pump wear.

Gas engines usually keep running until you switch them off, so check the manual if the engine itself stops unexpectedly.