I have a p216 onan on my welder with the same problem if i give alittle chock it will wuit and once it runs for awhile i can take the choke off and it runs like new .my guess is the carb needs a good cleaning she is 25 years old now and been rode hard without much maintenance at all just gas and oil and for the last couple of years she has just set quite abit.todays gas really sucks.going to clean her good after this job is done hope she makes it that long.
I had the same problem with my 520 with the snowblower hooked up. Seems like the air bleeds get clogged up and its difficult to get them clean. It would only happen at full throttle or under a load.
That's just the idle mix screw. Although opening it about 5 turns helps, it doesn't idle well as its way too rich. It's also not the right thing to do and indicated there is an issue elsewhere
Looks like your governor return spring is in the wrong hole. Should be in the third hole from the pivot, then adjust your carb properly. Air mixture screw should start out at 1 1/2 turns from closed position, then turn either way at 1/8” increments as needed.
He is spraying a flammable fluid like brake cleaner around the Manifold and listening to hear of there is an increase in engine RPM. If there was a air leak the will idle up. Surging is generally . cause be an improper mister of air and fuel
Could be an intake leak the intakes on these are silicon on the middle to seal it might be leaking air causing an air to fuel issue or your float could have a hole in it or the needle is not sealing properly or the float level could be off or maybe just dirt in it
That’s why it’s hunting. He hasn’t adjusted the governor to run in the new position. I had a bent throttle arm going to the carb on an Onan P218G, and it did exactly this. Bent the arm back up, and presto, problem solved.
That new carb in the video was from a 520. No matter how I jetted it it just never worked right. I found another correct carb and after a good few day soak in cleaner then into the ultrasonic...she is fixed.
@@DickWheels I'm going to have to buy an ultrasonic. Got a B43E on my John Deere that's been kicking my ass for years. Got it to run perfect the other day after revealing the intake, now it's back to sputtering and running like crap. I have tried 2 carbs, which both were freshly cleaned out with air, brushes, simple green the other day before I put either of them on the tractor. Beyond frustrated with this thing, haven't been able to mow my own lawn with it
As I see, you posted 4 years ago. He lost then. There was no evidence of the steal. And yet Frump is going to try yet another time. "Experience is a dear school and fools will learn in no other."
