Question about Dewalt 3800 PSI Pressure Washer

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DeWalt 3800 Pressure Washer Runs 20 min then quits.

Runs great for 20 mins, then power loss. After "cool down" machine okay.

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I have the same problem and even have the issue with gas cap off.

Posted on May 27, 2010

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Posted on Jan 02, 2017

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Washer runs great for about 3-4 min than shuts down. Motor runs as long as I do not ingage the nozzle.


Recently I have a similar problem, with a easy solution, just don't push the accelerator nob all the way, leave a 1/4 before reach full power. Apparently some times there is a bad calibration an make the carburetor over flow and lost power.

Sep 11, 2014 | Garden

1 Answer

The engine runs but the water will not come out under pressure


You must have blown out the cones (thats how the water gets compressed inside of pump) in the water pump-

You could try this though on the back of the washer right on top of the water pump is a black knob about the size of your hand that knob will adjust the pressure try turning it and see although I doubt that is the problem-

A pressure washer is not like a compressor you HAVE to pull the trigger every minute NEVER let it just sit there running without pulling the trigger to release the pressure that Dewalt 3800 psi washer you have is a great machine in fact we own 4 of them and they are pretty powerful and easy to damage if left running alone.

TY,

Perry Tradesman

Sep 05, 2014 | Dewalt 3800 PSI Pressure Washer

1 Answer

Quits running after 30 Min


Year make and model, and are you loosing power to the coil when it will not start ?

Apr 30, 2013 | Dodge Cars & Trucks

1 Answer

Loss of power


Loss of power after running for a while can be caused by anything from a partially clogged catalytic converter to engine overheating due to a faulty engine cooling system. Lots of other things can cause it as well.

Mar 18, 2012 | Cars & Trucks

1 Answer

Pressure washer problem


hello,After it stalls take the fuel cap off and put it back on and see if it starts,maybe the cap is bad or clogged and not letting air in to equalize the pressure of the fuel being used in other wards a cloged vent, !!

Feb 18, 2012 | Garden

1 Answer

Dewalt DPD3800 pressure washer starts and runs fine. After 5-10 minutes of washing the engine quits. It will not start until it cools. The engine will start after a 10 minute cool down. It will run and...


I have the exact same pressure washer and have had the same issues with it. The cure for me was to simply run the washer with the gas cap loose. For some reason the fuel gets vacuume locked and stops flowing into the carb. The fuller the tank is it seems the shorter the time is between the time it starts and the time it shuts off. Or you might find a way to vent the cap. Hope this helps.

Jun 06, 2011 | Dewalt 3800 PSI Pressure Washer

1 Answer

Must wait 30-40 mins to restart engine


Check your manual to see if it call for premium or regular. Premium has less energy per gallon and is designed for higher compression engines. What makes it "premium" is more anti-knock compounds - not better quality or performance. Sounds like a vapor lock problem that resolves as the engine cools. Regular gas may help with that.

May 03, 2010 | Briggs & Stratton 3000 PSI Pressure Washer

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