Question about Briggs & Stratton Prosumer 20324 Gas Pressure Washer

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Pressure washer will run on choke and die when trigger pressed

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Posted on Jan 02, 2017

spraydoctor
  • 97 Answers

SOURCE: pressure washer stalls

It is possible that you just need to allow your engine a little more time to warm up before moving choke lever to the off position. Let me know if this does not help.

the other problem suggests the "unloader valve" (uv) is not functioning properly. The uv is the device that allows the water to be routed into a bypass loop when you release the trigger. This part may even have something to do with your choke issue. Not often, but once in a while, they can hang and not allow water to pump freely in either direction (out the hose/nozzle or bypass loop). If this pressure washer has been exposed to a hard freeze without being completely drained, this could damage the uv and the pump.
One other point -- old gas from last season should be discarded. Gas degrades and can cause what you are describing.

I hope this is helpful and gets you going! If yes, please take a sec to rate me. Thanks.
Don

Posted on Mar 14, 2012

  • 1 Answer

SOURCE: Pressure washer stalls off choke

Check if the carb i is properly seated and screws are not loose , it could be sucking air

Posted on Sep 26, 2012

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1 Answer

Turn off when I press the trigger


try using it with the choke closed half way if it runs okay you will then need to clean the carburetor by removing the fuel bowl and in the stem there is a jet and fuel tube jet must be removed with a screwdriver.

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1 Answer

When I release the tigger the pressure washer stops running. Runs fine as long as trigger is depressed. What could cause this?


When the trigger is pushed, the engine is supposed to rev up to increase the pressure. So from the description, is sounds like the idle speed is simply set to low and it dies. So just set the idle speed higher. You could set it as high as pulling the trigger does if you want, but that would waste gas.

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I am afraid that is how they work even electric ones wont start unless you squeeze the trigger ,once they are running you should be ablr to release the trigger , and then squeeze it again whilst running . if yours dies when you release the trgger while motor is running -----good chance you are working at too high pressure. but to start you have to release all the internal pressure

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Sounds like the governor is stuck. My pressure washer speeds up when it has to pump. Don't know if yours uses vacuum to trigger governor or direct linkage. Good Luck.

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1 Answer

Pressure is fine when first started ,if trigger released no Psi


Your uplift injector valve in the water pump is sticking. You need to remove this part. Lube the top o-ring only with a water proof grease. Reinstall this part. You will be up and running again.

You need to use needle nose vise grip tool to easily remove the valve. You need to grind down the vise grip tool to fit the opening where the valve is installed.

To prevent this problem from reoccuring use a pump guard additive.

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