More Pressure Washer problems
I have a Craftsman 2600 psi washer (model 580.742780). I can start it easily, it runs 5 to 10 minutes and then quits. I start it back up and it runs 6 to 8 seconds and quits. I can do multiple restarts and get the same run for for 6 to 8 seconds with a following instant shut down - It appears as if the ignition is turned off when it happens. If I let it set for a while I'll get a 3 or 4 minute run before it quits.
I do get a small continuous flow of fuel from the carb bowl whenever I pull the plug from the bottom. The engine oil is at the proper level. This unit only has 3 to 4 hours run time on it.
The unloader assembly seems to be working properly as it opens when I release the nozzle trigger (the engine "unloads") although sometimes I get a pressure lock and must release water pressure via the trigger before I can pull start the engine.
I do know there's a low oil pressure switch on the engine and thought it might be the culprit (warm engine and the lower oil viscosity produces a lower oil pressure) - I tried shorting out the switch but it didn't seem to do anything (maybe that's not the right way to check it ?)
So I'm now at a loss as to what to try next. Any suugestions ?