Sounds like the governor is stuck. My pressure washer speeds up when it has to pump. Don't know if yours uses vacuum to trigger governor or direct linkage. Good Luck.
I have a Honda 2600psi 2.3gpm pressure washer, the motor runs fine, the pressure is fine for about 5-10 seconds then it feels like the pressure drops and the hose and the water coming out of the gun is speeding up and slowing down. Any suggestions prices on parts would really help tks..
It could be the nozzle or something else is plugged. It is overloading the motor too much. Try squirting it with the engine not running. A good amount of water should come out at low pressure.
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