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This is your tax dollars at work. I bought this powerwasher used from the US military. I suspect that they wrote it off because the gas line from the tank to the carburetor was rotten and leaking. Why else would they write it off? If, say, the engine wore down and that was the reason, the line would not be leaking. I replaced the line and the engine started on the second pull. It is supposed to be a bad ass power washer, up to 3,000 PSI, with the Briggs and Stratton 11 HP Industrial/Commercial engine.
First Question: the engine goes faster and slower every 6 seconds or so, maybe varying speed by 30%. Why would that be the case.
Second question: how would I regulate water pressure on this beast? There is no obvious valve that I could touch. I think that 3,000 PSI is serious pressure and I want to get some opinions before I start messing with the pump. Maybe I should torque the nut on top of the pump, shutting off bypass.
(Click on the thumbnail images to enlarge)