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Even with a new pump its important to check fuel pressure and flow . Low pressure fuel pressure regulator stuck open or fuel pump faulty . Low flow blocked fuel filter . if the above is all ok. Back probe injector with led trouble light , light will glow while motor is turning over. if not check fuses , if ok check injector cable back to the ECU for bad connections .
If it's brand new, the first thing I'd check is the oil level in the Honda motor. Most pressure washers are tested then the oil is drained out for shipment. Honda motors have an oil sensor in them that will shut the motor off if the oil level is low. When the motor is off, all the oil is in the bottom of the crankcase and the sensor 'thinks' all's OK. When you start it up and the oil is getting splashed around it will get low enough for the sensor to shut the motor down. Also make sure the gas is turned on at the carburator.
You need to start the unit and let it run for few minutes to get worm, make sure the water is fully open and the unit is fully cleaned.Push on the trigger on and off for few times not letting the unit shutdown, then start increasing the fuel mixture ¼ turn and push on the trigger again and see…this could be that the unit need service or the governor springs getting week if you got one on your unit…let me know how that work for you and please do not forget to rate my service so we can improve on it with your help.God bless
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.
how do you know the pressure (im guessing you mean cylinder pressure) is low? this can be caused by : Leaking or bent valves from a broken t-belt or skipped timing (from loose t-belt), and bad piston rings how many miles on this motor and does it run at all? you should check your timing belt and be sure the timing is set correctly please let me know and be sure to rate this solution -jeff
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