Having problems keeping pressure washer running while under pressure

NO
persistent running is problem valve washers either in the water level control or the flush washer under the press buttons
low pressure will take a longer time to fill but when the level is attained the water will stop flowing in

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

When water is running through system, the motor has to run to keep the pressure built up. So, if the water is leaking out, the motor think it needs to keep running to keep the pressure built up. The leak needs to be fixed to the motor will not run constantly.

Hi Jean
Yes it could be a freeze plug but also may be a gasket or hose that is leaking.
Get the car to a dry hard surface and let it run, then check to see if you can locate the leak...you may have to put it on jack stands to accomplish looking under the vehicle...just make sure it is not running at the time you go under the vehicle
Bud

If the pump is pulsating rapidly most likely valves are leaking or debris under valve keeping one or more from closing. If the pump pulsates slowly, comes up to pressure then low pressure then repeats, problem is pressure regulator /bypass. Or you could have a combination of both. Try lowering the pressure to lowest setting to see if slow pulsation stops. As parts age within pump and debris hinder operation you can no longer operate at full pressure. To make the pump last, use highest pressure as needed and everyday work using only 60 to 75 percent of capacity.

Pressure washer when you first try to start them that stop underload. We had the same type of problem with 11 hp Honda if you hold the trigger open the motor will be under less load we found by running the motor for about a minute it would work normally. Remember to make sure the water hose is turned on pull the trigger on, until water is coming out of the wand , now try and start the motor but also hold the trigger open, now you will not be building maximum pressure, after about a minute release the trigger and see if it keeps running.

The problem you are describing lies in the engine. In most cases this can be cleared up by doing a tune up. In the meantime you can try choking the engine slightly and see if that keeps it running under pressure. This will usually solve the problem with the smaller GC and GX series Honda engines until you can do the general maintenance.

Sincerely,
Aron Kerr
Landa Northwest
800.247.8103
503.255.6508
www.landanw.com

Pressure washers have a pressure regulator/unloader that bypasses the water back into the intake when you let go of the trigger with motor running. If you let the machine run for long preiods in bypass the system could be damaged due to heating of the water being bypassed. The water is in a closed loop. The as the unloader wears it will tend to want to bypass which is what is happening in your case. Dirt trapped at the tip will cause this also. Install clean tip to solve problem. If clean tip did not help then try lowering the pressure by turning pressure regulator counterclock wise. If problem is gone then parts are failing but keep using pump. Good luck.

Your unloader valve is not functioning. Take it apart and make sure it all the parts are able to move freely under the spring. You may need a new o-ring or two if you see damaged ones.

if the motor will not turn on ,thers a problem with the current excess switch , which is situated under the main power on of swith hi needs to be replced