If your pressure washer is not building pressure and the engine is surging there could be a few different causes.
Honda pressure washer unloader valve diagram.
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This pressure washer was one one of the machines that sat for 8 years.
They redirect water from the pump when water is not exiting the system.
One of them is a sticking unloader valve.
If the pressure washer unloader valve isn t working replace it using the manufacturer approved replacement part.
First of all unplug the valve retaining pin that locks the unloader valve with its bay.
Unloader valves are another important part of every pressure washer.
This video shows the unloader valve in a cut away of a 2700 psi homelite pressure washer.
The unloader valve kit includes the o ring and all parts needed for the repair.
Typically most of the pressure washer manufacturers keep the unloader valve visible.
When a pressure washer is in operation but the gun trigger is not depressed something must be done with the pressurized water coming out of the power pump since it s not exiting the system.
After watching this video you may be able to get your pressure wash.
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I finally got around to working on it.