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Water runs out of radiator and out exhaust when engine is running it,s a vs commodore engine

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Blown head gasket. compression is forcing water back into cooling system

Posted on Apr 21, 2009

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Engine runs fine. But it quits when I pull the trigger on the wand to start washing


Does this behavior change if the engine is warm and on minimum choke? Do you get any water spray before the engine quits? Carburetor could be dirty or float stuck. Try putting dose of carburetor cleaner through engine and cycle choke lever and engine speed lever back and forth while engine is running after it has warmed up without running water spray. See owners manual.

Apr 03, 2015 | Craftsman 2700 PSI,2.3 GPM Briggs &...

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Engine runs fine and then shuts off when I turn on sprayer


When the gun trigger is pulled, the back-pressure holding back the engine is reduced and the engine accelerates.

Your engine is dying when it should accelerate.

Good news is you have spark and combustion and fuel and the engine runs.

1) Check the exhaust port for build-up of carbon or dirt >>> the hot exhaust gas has to fly out of the exhaust port and if the port is clogged, then the engine stalls

2) Check the amount of fuel getting through to the carburetor >>> pull off the rubber hose entering carburetor from the gas tank >>> does gas run out freely? If gas does not run freely, then take apart your gas filter located just below gas tank

3) Remove air filter and see if problem continues. A dirty air filter can cause engine to stall since combustion requires oxygen coming through the filter. Replace the air filter.

4) Mess with the choke lever and see if you can find a setting where the engine works >>> our old power washer would never run when lever was moved to full throttle >>> we just left the choke lever at half throttle and the engine was happy

5) If above fixes don't fix the problem >>> the final suspect seems to be the carburetor >>> try some gun-out >>> maybe a trip to small-engine repair shop is required.

Oct 19, 2010 | Honda Black Max 2600 PSI Pressure Washer

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What would cause a pressure washer to cut off after you pull the handle to get the water started


We used power washers for years

When you pull the trigger, the engine is supposed to accelerate because the back-pressure on the pump is released.

The back-pressure is why you're supposed to keep the gun trigger open when starting the engine. It sounds like you're starting the engine with no water passing through the gun.

Inspect the exhaust port >> if exhaust is clogged with carbon or dirt, then the engine will not run at high speed.

The problem may also be cause by a rusted choke lever. If you notice when a small engine accelerates, the choke lever moves up as the carburetor demands more gas.

Start the engine with water passing through the gun >>> move the choke lever a little bit at a time and see what happens. Keep water going out of the gun. When the surfaces are cool, spray WD-40 on the lever and see if you can free it up. WD-40 is extremely flammable.

If your engine will not fire at all by starting with water passing through the gun, then your gas supply might be limited or your carburetor gummed up. Pull off the rubber gas line that connects to the carburetor and see if gas flows.

Next, pull off the air filter and see if the machine runs good without air filter. You may have clogged air filter.

While the carburetor is exposed, spray WD-40 into carburetor. See if you can get engine up to full throttle while spraying WD-40 into carburetor. Keep spraying the WD-40. Keep the water flowing out of the gun.

If the engine throttles up all the way on WD-40 but won't run without it, then your carburetor is probably gummed up.

Our old power washer won't run with the choke set at full throttle. We just got into the habit of leaving the choke alone. We'd pull off the air filter and spray WD-40 into the carburetor so the engine would spark healthy without messing with the choke at all. And we kept the choke about 2/3 open all the time.

Oct 15, 2010 | Pressure Washers

1 Answer

My troy built 2200 pressure washer was running fine but then shut off instantly I then noticed it had low oil I filled it but now it won't start


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Pressure washer takes oil in two places:
Pump oil is 20-30 weight SAE non detergent and comes half way up/ do not fill more than 1/2 way
Engine oil is 10W30 and comes half way up dip stick
IF you overfilled the oil >>> DO NOT turn power washer on it's side or upside down to drain oil >>> because engine oil will fill carburetor

When engine won't start
We pull off air filter so we have direct access to carburetor
Spray WD-40 into carburetor while starting
The engine will fire on the WD-40

You can keep spraying WD-40 into carburetor to keep engine running while moving choke to see if engine will run on it's own
Squeeze gun trigger so water comes out gun and pump pressure doesn't stop engine

If engine will not fire on WD-40
Spark is suspect
Your spark plug gets power from ignition coil
If coil is bad you get no spark > and coil needs needs replacement
Take out spark plug, clean it with WD-40 and use a bit of sandpaper in the spark gap
Put spark wire back on plug
Touch threads of spark plug to metal part of engine > pull cord and look for sparking between spark plug and engine
If you do NOT have any sparking, then coil is bad
If you HAVE spark, then your spark plug needs cleaning or replacement

If engine fires on WD-40 but will not keep running
Then either fuel or carburetor are suspect
Loosen hex nut on fuel filter located below gas tank >> if fuel flows, then re-tighten hex
Next, pull off rubber hose connected to carburetor to see if fuel flows to carburetor
If fuel is flowing to carburetor, then the carburetor is suspect.
Small engine repair shop will have carburetor cleaners

Check exhaust
There is a screen over exhaust
Make sure it is clean of carbon build-up > Use WD-40

Change air filter

Oct 12, 2010 | Briggs & Stratton Pressure Washers

2 Answers

Starts but won't stay running, i clean carburator and still have same problem, unit has been used very little, still look new, Thanks,


Have you checked your oil? You need pump oil half way up in reservoir. Open plug on top of pump and check oil. Pump takes SAE 20 or 30

Next, open oil plug below engine and check your oil level. It should come up 1/2 way on dip stick. Engine takes 10W30. Don't turn washer on its side or upside down to drain oil or oil will run into carburetor.

Is the water turned on? Are you holding gun trigger open while starting? Pump needs water flow. DO NOT tie gun trigger open with wire and then start engine. That gun will flip around and shoot a hole in your leg.

If the engine starts, then you have gas, spark and compression

If engine won't stay running, the exhaust port might be clogged, or the carburetor is not letting in enough gas, or gas is not flowing to carburetor.

Check the screen over exhaust port > is it dirty or clogged? Clean with WD-40 or break it out with a screwdriver.
Remove gas filter below gas tank >>> it has a hex bolt >> loosen bolt >> the gas should come flowing out >> put it back if gas comes out
Next remove rubber gas line feeding gas to carburetor >> gas should flow out this line too >> if flows then put it back.

What about your air filter? Take it off. See if engine fires and runs without air filter. Air filter may be clogged.

While air filter is out, you can see open port to carburetor. Spray some WD-40 into carburetor. Fire up the engine. It should spark real healthy on the WD-40. Keep spraying WD-40 into carburetor to see if you can keep engine going. Don't forget to keep gun trigger open so water is flowing and pressure is not building in pump.

If engine keeps going with WD-40 but dies without it, then your carburetor is very suspect. You might need a new one.

If engine will not keep going with WD-40, then the spark is very suspect.

Change spark plug. Try again. If it doesn't fire up after that, you need to take it to the shop for repair.

Oct 09, 2010 | Honda 2500 PSI Gas Pressure Washer

1 Answer

HI can you please tell me rv anifreeze can be used in cars or is it just for powerwashers thank you


The anti freeze is to be used in cars only as when the cars are parked out in cold countries the water in the radiator, engine jackets , water pump should not freeze as it will damage the pump or the expansion in the radiator will damage the radiator , hose engine. Hence the need.

Sep 29, 2010 | Mi T M WP-2700-4MHB Pressure Washer

1 Answer

Engine will run for 1 minute then shut off with a cloud of white smoke out the exhaust. i remove and cleaned carb. float is free not binding no improvement


This symptom can indicate several problems, white smoke is usually indicating water in the system, as this is air cooled honda motor, therefore it is not coolant, check oil and check if there is water present in oil sump or in fuel tank.

Water from fuel tank can be easy drained, with fuel, replace then as well fuel filter and clean again carby. add about an ounce of methylated spirit adn fill gas to full, start engine and check if problem still present.

If this did not solved the problem, check oil for presence of water.
Water can seep to oil sump through trans, and as water pump is located directly on the shaft, simmer bearings may load water under pressure to the crancase. If necessary, repalce bearings and seals.

Please let me know if this was correct advice, or you did find other reason for that white smoke.

Oil is usually burning bluish, fuel not fully burned is black.

Hope that this will be just condensation in the tank.

Aug 06, 2010 | Northstar Pressure Washer 3000 PSI

1 Answer

Hooked it up with water started engine and no


Your water system is plugged with "gunk"
You will need to slush it out with water and air pressure if you can until it runs clear

Apr 04, 2010 | Briggs Stratton 020273 Elite Series...

1 Answer

For pressure washer Model WP-2402-SWHB, SN 10132043: With Honda engine running, or no engine running, no water will pass through the pump.


Hi If no water is passing through your pump on mains water pressure and not sucking from a barrel then it will be either a blocked nozzle,blocked unloader on the side of the pump or a blocked water filter.

Dec 11, 2009 | Pressure Washers

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