Dewalt Garden - Recent Questions, Troubleshooting & Support

Question edited for clarity, full 'make model (what it is)'. Question moved to a better category. This says you don't need it. You just need a 3/8 plug.145'F is the temperature it opens. https://mastertoolrepair.com/portable-gas-pressure-washer-parts-type1-dp3750-p-1687081.html There is one here, aftermarket type I guess https://cvindustrialhardware.com/shop/dewalt/valve-thermal-relief/ More here https://www.google.com/search?q=dp3750+thermal+relief+valve ..

See this diagram:
http://www.mastertoolrepair.com/images/DPD3100_pump.jpg?osCsid=1f3m03ijp5lcht6569kran6rk2

Remove Items 122 (Un;loader) and 138 (Thermail relief). Clean them up as best you can with a nylon brush under some slow running water. Dis-assemble the unloader valve completly to clean (both ends). Then lubrcate them with White Grease and reinstall both parts AFTER placing White grease in the cavity the valves mount into. Very briefly... Test water flow with the engine not running Then start the unit with water off and let run 30 seconds. Turn off engine. Turn ON water supply and test water flow engine OFF. Note you will get a certain amount of white grease initially that passes through the unit. Start unit and rapidly actuate the trigger 1/2 second on 1/2 second off multiple times to force the unloader valve to cycle.

You can get parts here if either of the valves have completly failed:
http://www.mastertoolrepair.com/dewalt-dpd3100-n001194-pump-p-59405.html

The above steps should get your presure washer working properly again.
Thanks for choosing FixYa,
Kelly

Try disconnecting the oil level switch.

The after fire solenoid helps prevent backfire when the engine is turned off. You can operate the genset without the solenoid and likely it will shut off without issue.

You can easily test by removing the solenoid plunger or the tip of the plunger and reinstall the solenoid.

How did any of the advice given help what was asked? How to you replace the pull cord on this pressure washer?

page 15 DeWalt DPD3800 Instruction Manual Nozzle Cleaning

John Deere will replace the cap for free; they acknowledge the vendor who supplied Briggs & Stratton gas caps provided faulty caps. Call 1-888-228-3068 then 1 (English), 2, 1 and a technician will ask you for model number and Serial Number (which they need to replace the cap). Don't drill a hole in your cap: debris will find a way into the gas tank and end up possibly fouling the engine. Bob from NJ

If it's new i would take it back and ask them to check it out or even replace it if needed.

Had a similar issue with my dewalt 4200 pw. Unit starting shutting off after spraying for about 5 min. Then difficult to restart, but would start again eventually only to shut down a few min later. Had new engine oil, new pump oil, good gas. I changed the spark plug and unit runs great again!

There should be a mark on the dipstick min and max. Keep within the 2 marks.

Remove spark plug and clean with dry cloth and then put a teaspoon of gas in the hole where spark plug was installed. Next reinstall spark plug and try starting. It should start.

Just pull out the suspect plug and replace with same.