Question about Karcher 2500 PSI Pressure Washer

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No Pressure My Honda GCV166 (5.5 hp, 2500 gal/min) runs fine for about 5 minutes, then the pressure goes down to almost zero.

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Is the engine still turning up good or does the press. fall when engine rpm drops? your not very clear on this.if the engine is dropping rpm there is several problems causing this and without being able to actually see and hear what is going on there's no way i can go thru all that could be wrong.

Posted on Apr 21, 2009

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Pressure washer worked fine and suddenly no


If you remove the tip, will it work? If so, unloader valve is sticking and needs to be removed and lubed with lithium grease.

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Have a powerstroke gc 190 honda pressure washer the pressure is great for a little while then it seems to bleed off its a brand new machine. Not even 15 minutes on it.

Sep 05, 2009 | Karcher 2500 PSI Pressure Washer

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Runs fine gc160 wont give me any pressure. i took the pump apart and cleaned it then put it all back together the pressure was intermediate but now nothing at all


if you give us a bit more information we may be able to assist!

is it a pressure washer you are trying to get running.
the number you give is the model number of the honda engine. 5.5 hp honda domestic use.

what does the pump look like. etc

Jul 18, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

Engine keeps shutting down


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May 23, 2009 | Briggs & Stratton 020324 3700 PSI Pro...

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Pressure Washer Pump and Engine Stops Suddenly


The pump might be binding against the motor, causing the pump to overheat and temporarilly "seize up" and shut the engine off.
After cooling down for a brief period (5~10 mins) the engine can usually be re-started, but the overheating problem will keep coming back.

This happens when the pump either wasn't seated against the engine properly during it's initial instalation, or the pump housing wasn't machined properly and the PTO shaft is trying to drive the pump at a slight angle = excessive friction = overheating.

Try this:
1) Loosen the bolts that mount the pump to the engine just enough so that the pump can be wiggled slightly.
2) With the engine power switch in the "OFF" position, slowly pull the recoil starter rope so that the engine / pump completes about two revolutions. This helps to align the pump surface with the engine.
3) Lightly snug the pump mounting bolts in a criss-cross pattern, then slowly pull the recoil starter rope again to ensure that the pump isn't binding.
4) Finish tightening the pump mounting bolts in the criss-cross pattern (approx. 21 foot pounds torque).

The entire process should take you roughly about 10 mins from start to finish.

If this doesn't remedy your problem, then try running the engine for 20 mins with the pump COMPLETELY removed so as to isolate the components.

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Pressure washer, john deere 3000 psi, honda engine


It sounds like your intake is plugged with debris. What usually happens is a water hose that has been laying around will get various stuff in it -- dirt, grass clippings, small insects (and whatever they take into it nest building). These days most homeowner pressure washers do not have a proper inlet filter, but just a screened hose washer like on a washing machine. The unloader valve can cause pressure variance, but usually not in the manner that you described. The pump is being "starved" for input water. Just use a pair of needle-nose pliers and pull out the screen and clean it or replace it.

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1 Answer

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The solution is very simple. All you have to do is change the spill valve.
This because the spill valve is not worth servicing. The actual problem is that the spill valve is leaking from its bottom-part seating. When you close the gun, the spill valve goes down, opens from the underside, and switches the electricity off. When you press the gun, the spill valve returns to normal, and if the underside does not close, you have low presure, because the water keeps circulating.
Regards,
MG. (Karcher service engineer).

May 05, 2008 | Karcher 2500 PSI Pressure Washer

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