The seals are wearing out in the pump. I often rebuild this sort of thing. Besides saving the cost of a new washer, you'll be helping the environment. Our throw-away society is dumping millions of pounds of stuff in landfills that could be fixed and used for countless more years.
First thing you need to do is seperate the engine from the pump. There should be (on most motors) four nuts and bolts that run through the engine, frame and pump. Take them out. Sometimes you have to wiggle and pull to seperate everthing. Now turn the pump over. Don't take the plate off that is closest to the engine. It won't hurt anything, but you'll just lose the gear oil out of it. Take the bottom plate off. Just remove the four or six bolts from the bottom and pull the two halves apart. One removed, you'll see (depending on the model) anywhere between two and five approximately quarter size rubber washers. Also you'll see from two to six smaller rubber O-rings. Take all these with you down to Sears or a local small engine repair shop and get or order replacement parts.
Now to put it back together. First you'll need to remove all the scale and deposits on both sections of the pump. You can do this with some kind of chemical cleaner, or I just make with some light use of a wire brush nd water to rinse. It's also a good idea to back-flush everything while you've got it apart. Put the new seals and O-ring back in the same places you took the old ones out. Carefully, being sure not to knock any of your new seals out of place, put the two halves back together and tighten the bolts down securely.
To put everything back together with the frame and engine, place the engine on the frame and run two bolt down through the frame to hold it back in place. Now, preferrably with a helper holding the engine in place so it doesn't want to fall off the frame, tilt the frame back. Stip the pump up on the engine shaft, lining up the keyway. Then turn it to line up all four bolt in the same position as it was originally. Install bolts and nuts and tighten securely.
Good luck. If it's your first time rebuilding a pump, its really not hard at all. Just take your time and remember how everything was while disassembling. Be patient and its a snap. I've rebuilt these things in the past for less the ten bucks. That's a whole lot cheaper than a new pressure washer.I have a gas powered pressure washer for some reason its coming out with any pressure right now what can it be
Your system is losing pressure somewhere (obviously). If the engine is running fine, I would begin by checking to see if the pump is turning as it should. If it is, then check to see if all connections are tight and such. How old is it? Could it still be under warranty?
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