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Craftsman Pressure Washer stalls out when trigger is released

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Pressure unloader is stuck in closed position. Have to know what type of unloader it has to see how to get to the "ball" check. Probably rusted to the seat. Might have to replace the seat, orings and ball.

Posted on Apr 15, 2014

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Posted on Jan 02, 2017

  • 83 Answers

SOURCE: honda pressure washer cuts out when lance trigger released.

You most likely need to set your valve clearances. If it is hard to pull over or the recoil snaps back after starting your valves need to be set for sure. This may not be the entire problem but it is a good start. Also change the spark plug, a bad plug will cause odd problems and is too cheap not to eliminate as a source. In addition check your fuel, pour a little out into a white container (I like spray paint can caps for this) and look at the color. If it is yellow to orange it is bad. You can pour it into you car, the car electronic sensors will compinsate for it quality but a small engine can't. Use a NGK BP6ES or BPR6ES plug.
You need:
Feeler gages
10mm open end wrench
14mm open end wrench
1 long shaft screw driver or rod
1 spark plug socket and ratchet

Remove the spark plug and the valve cover. Pull the recoil over slowly until the intake valve opens (intake is closes to the carb and it will go down when it opens). Now put your long screwdrive down the spark plug hole. Slow pull the engine over until the screwdriver handle is at it highest point, this is top dead center. It may take a few attempts. Now check your valve clearance between the rockers and the top of the valve. The intake should be .006 and the exhaust .008, both can be +/- .001. To adjust: hold the large nut with the 14mm then loosen the small one with the 10mm. Lefty loosey. Now turn your large nut until you get the correct setting and then tighten the small one the lock it in. It may take a few attempts and alway reverify your setting after you lock it down. Once done, find top dead center again and reverify. Now your valves are set.

Posted on Mar 31, 2009

  • 15 Answers

SOURCE: builds up to much pressure in hose and stalls engine

Sounds like the unloader is not working. try replacing it and see if that helps.

Posted on Apr 23, 2009

  • 1111 Answers

SOURCE: I have a craftsman 4.5hp quantum xte pressure

the pressure relief valve(bypass) is most likely stuck or clogged. take the relief valve off and check for broken or jammed parts..there should be a bypass hose that goes around the pressure valve

Posted on Jun 20, 2009

  • 174 Answers

SOURCE: Lack of pressure after releasing the trigger on the wand

Hello awcockerill:
This sounds like the bypass (unloader) valve is sticking. Here is a diagram of your machine's pump. On page 2.4 see part #1. The top of this assembly is a black plastic cover. Remove all of assembly # 1 carefully. Under that is part #8. This is the bypass valve. You need to pull this out, check that the o-rings are not bent, worn or damaged, then lube it good with a VERY VERY good waterproof grease. Re-assemble it and all should be well. The part numbers are on the diagram but where to get them depends on were you live. Karcher web site may give you a number to call. Good luck.

Posted on Aug 25, 2009

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1 Answer

Craftsman 2200PSI pressure washer, part #580.752700 dies when trigger off.


NEVER start an engine on a power washer with pump attached. You will damage pump and get no or very little pressure. Replacing pump only fix. Pump for this washer about $49. Check spring on carb for throttle open/close

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1 Answer

My honda xr2600 pressure washer stops running when i pull the trigger


check for a blocked main jet in the carby
the principle is that when the trigger is released there is no pressure in the pump so the engine is idling
when the trigger is pulled the pressure control valve closes the bypass back to the pump and so the motor is loaded up if there is a problem in the carby ,then the motor will stall

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1 Answer

Constant pressure


Some of these machines require you to hold the spray handle trigger in the open position while starting the motor, once it is running let the trigger go and it should run on bypass

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1 Answer

Hello i have a 6 hp briggs pressure washer and it starts fine and runs for 30 seconds and shuts off. it feels like the motor gets stuck when i try to start it again, but after a half hr or so it will turn...


You have to make sure you are pressing the trigger while you start the pressure washer. You should also make sure you are releasing the pressure at least every 30 seconds or the pressure will build in the pump and the engine can stall.

If it stalls with pressure in the pump and you don't relieve it by pressing the trigger, it will be very difficult to start. The pressure will slowly bleed off over time, which sounds like what you are seeing.

Jun 07, 2011 | Briggs & Stratton Gas Pressure Washer...

1 Answer

My 1750 psi campbell hausfeld pressure washer will operate at first until I release the trigger on the wand. Then it won't restart. If I wait for a while it will run again. Sounds like the pressure switch.


Common with that washer...it has a wabble pump. Release the trigger, if by pass does not engage, stalls engine. You can however keep using it, all you have to do is keep trigger pressed, and when you are cranking engine, depress trigger with the free hand. Can be repaired, but the fix probably will cost more than a new pump.

Oct 18, 2009 | Garden

1 Answer

Stalls when triger released


the problem may be the oil. if the oil is fine then try crimping your hose to let less water pressure through. if that still does not work lowes or home depot will fix the problem cheap. thank you for using fixya

May 01, 2009 | Garden

1 Answer

Pressure washer stalls out when wand nozzle is released


common for not starting unless trigger engaged as you are turning the pump as well as engine creating pressure,as for stalling pump has unloader valve which is probably in need of grease(use good silicone grease)this allows water to ciculate when trigger released.

Apr 19, 2009 | Campbell Hausfeld Garden

1 Answer

Builds up to much pressure in hose and stalls engine


Sounds like the unloader is not working. try replacing it and see if that helps.

Mar 16, 2009 | Campbell Hausfeld PW2102 Gas Pressure...

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