Believe it or not, I had a similar experience with my pressure washer. It ran fine, suddenly start to sputter then smooth out and run fine for several minutes before doing it again. Finally died. Started a couple of times but then got to where it wouldn't start. After eliminating fuel issues, I found the plug would fire for only the first pull though it looked perfect. Grabbed an old plug and she fired every time. Went and bought the correct plug, she runs great now. This is my first time seeing a plug fail like this.

Like you said you may end up having to make you one. You would think as many pressure washers that are made and sold that some one would have thought of that. Maybe has something to do with safety.

Thanks Bill. Have I told you lately that I love you? That's an old song. You should remember it as well as I. Apparently you nailed it for me and I have part # 694260 en route. :^)

IMO The problem usually is something stuck, may just need loader valve or unloader valve dissassembled, cleaned, and seals lubricated (if you turn an adjustment screws make sure you count the turns, so you can put them back where they were or you will encounter new problems). Outside chance it was run dry and burnt up. IMO also it it had been run dry in the pass, (No water hose hooked up and water inlet pressure flowing through the pump they get hot real fast with no inlet water hooked up or if you run it and don't have the trigger pulled. I never run mine more that half minute without pulling the trigger to alow water to flow or I shut it off)It could be brunt up or just worn out. Only dissassemble and inspection will tell. Anyway what you got to loose it an't working now so might as well try it.