Onan P220 Govenor/ Surgeing

Mike in MI · Jul 25, 2013

I have JD 420 with the P220 engine and it wants to surge at full throttle with no load. *But Runs fine when under a full load.*

I moved governor spring in all different hole positions seems to make no difference on what I do there.
I also removed top on carburetor and check for any dirt in jets. (was clean) No dirt.

Any help on this subject sure be a welcome! As I ran out of ideas.
Thanks for your help!
Mike

gab · Jul 25, 2013

Not saying it's your problem but I've got two Onans, a p218 &220 and both have had surging problems. All I've ever done to fix them is spray carb. cleaner in the air horn, where the choke plate is. There's about a half dozen holes around the outside and a couple little holes' air bleeds. Then blow it out with air and go, always has worked for me.

Bob · Jul 25, 2013

Governor is NOT the problem. As gab told you, carb IS. Check intake manifold, as well.

robert kummer · Jul 26, 2013

club
there is a known problem with the plastic
flyball spacer ( breaking ) on many of the onan P engines.
i do offer a kit using the older steel spacer,
or the new style plastic one.( with the longer tab
that fits into the notch on the gear.
thank you. boomer ( the used onan engine parts guy )

Onan P220 Govenor/ Surgeing

Mike in MI

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gab

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Bob

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robert kummer

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