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Okay, I am stumped. I recently tore down and cleaned the Onan P220 on my 1988 520H because it was surging at operate. Long story short now it won’t run. I have the thread from the teardown Here. I cranked it and it would start so I adjusted the carb, back to what the service manual that was sent to me says. It puffed a couple times so I adjusted it and got it to run good and strong, but whenever there is a load on the engine i.e. moving forward or back or engaging the PTO with a 48” SD deck on. So I adjusted it more and it would not start. I got it to run again (with more adjusting) but same issue. I put in new spark plugs, no change. I put a jumper to the ignition coil and it seemed to run smoother, moved the jumper to the PTO switch to see if the issue was in there and it ran like it did without the jumper. I noticed the infamous 9-pin connector looked burned on the outside. But no, all the connections on the inside were normal and not corroded. Added some vaseline to act as dielectric grease. Nope that’s not it. I noticed it smelled like gas and saw some shooting out the exhaust, so I made the mixture leaner and it back fired, but now that’s as close as I can get to it running. PLEASE HELP. Thanks, Andrew
