Honda gc190 surges with no load - Karcher G3025OH Pressure Washer

Hal, you may be able to adjust some what by changing engine RPM(throttle *****) and playing with the governor if need be with no load and with load.

Portable generator voltage regulator

Onan generator adjustment run speed voltage

https://mtspowerproducts.com/admin/data_sheet/SS321Manual%20II.pdf

flooded

what about it

This is a problem with GC-160 and GC-190 engines on pressure washers, tillers, etc. Once they get some hours on them and as things seat in-wear in, they get to a point you can not pull the start cord. If you remove the spark plug, the engine turns easily then the valves need adjusted. The valves are set .005" to .006" off the seat. This allows enough compression release but the engine runs. I find the valves need adjusted every 25 hours, not the 100 hours Honda states.

Sounds like a head gasket to me.

Most likely the pressure relief valve in your pump

hi have you checked all the fuel line inc filter for blockages regards

This may not be a motor problem. It sounds like your pump is not working properly and the motor is just following the pump. First thing to do is check for leaks in the pump, wand hose, gun etc. It may also be a blown water seal inside the pump.