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Onan P220 in a John deere 420


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#1 dropped82 ONLINE  

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Posted April 27, 2015 - 12:36 PM

I'll let the video talk. I'm guessing carb issues. Anyone have any other thoughts on it?



Eric
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#2 superaben OFFLINE  

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Posted April 27, 2015 - 08:41 PM

Eric, is your oil full of gas?

 

I'd say something is making that engine run rich.

 

Ben W. 


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#3 dropped82 ONLINE  

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Posted April 27, 2015 - 09:17 PM

I installed an electric fuel pump that can pump up to 4psi. I was considering this but it was fine until Sunday morning. Now seems tough to start. Will not idle which is set around 1300. Once under load, it seems to run better but will studder once in a while. I've tried to limit fuel flow by closing the shutoff a little to see if it gets better. Seems to get worse. Kinda of getting mixed info from it.

#4 KennyP ONLINE  

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Posted April 28, 2015 - 05:23 AM

Before it stutters, is it hunting a little? My B48G was hunting real bad. Found the float was way high.


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#5 dropped82 ONLINE  

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Posted April 28, 2015 - 04:59 PM

Yes...it'd tough to hear but it hunts with no load. Smooths out once it's under a load. I may pull the top of the carb tonight. Give it a good cleaning. Is it possible the float level changed?

Eric
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#6 olcowhand ONLINE  

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Posted April 28, 2015 - 05:13 PM

Sounds like something clogging up the works in that carb.  Onan carbs can be very finicky about ANY foreign crap at all in them.


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#7 KennyP ONLINE  

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Posted April 28, 2015 - 06:28 PM

Yes...it'd tough to hear but it hunts with no load. Smooths out once it's under a load. I may pull the top of the carb tonight. Give it a good cleaning. Is it possible the float level changed?

Eric

Mine did a bunch. But I hooked an electric pump to it.


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#8 dropped82 ONLINE  

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Posted May 08, 2015 - 10:30 PM

Funny, seems fine now and I've done nothing. Went out to start it and reproduce the problem. Low and behold, it's fine like nothing ever happened. Thanks.

Eric
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#9 dropped82 ONLINE  

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Posted May 09, 2015 - 12:09 PM

One other thing I'm having an issue with is the front pto clutch. If it is shut off while the engine is hot. It will not re engage until the tractor is allowed to cool. I'm guessing the field coil is to blame. Anyone else have this problem. Works great when the engine is cool.

Eric

#10 olcowhand ONLINE  

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Posted May 09, 2015 - 01:59 PM

It could be the air gap between the plates is too wide, and when the electomagnet is hot, it's not as strong, so it can't pull the plate in to contact.   I've had them do this, but once the air gap was narrowed, it held pulled the plate in & held fine


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#11 dropped82 ONLINE  

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Posted May 10, 2015 - 01:20 PM

It could be the air gap between the plates is too wide, and when the electomagnet is hot, it's not as strong, so it can't pull the plate in to contact. I've had them do this, but once the air gap was narrowed, it held pulled the plate in & held fine

You sir were spot on. I adjusted the gap a little tighter and that's what did it.
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