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mgk20181

engine over revs intermittently

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mgk20181

Hi I have a 520 HC wheel horse with a 20 Hp Onan. Problem is that whether blowing snow, mowing, or tilling the engine will run at the proper RPM's (3600 i'm told) and then all of a sudden it will speed way up so i have to shut it down. it has gotten way up over 4000 before i have caught it. And as i said it only does it intermittently. can anyone help me with this? 

thanks

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pfrederi

:text-welcomeconfetti:

 

Sorry i don't have any Onans in my WH Stable but I am sure someone will be along to help you

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WVHillbilly520H

Most likely a governor issue, Jeff.

Screenshot_20180125-163322.png

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WVHillbilly520H

Most likely a governor issue, Jeff.

Screenshot_20180125-163322.png

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WHX??

:WRS: MGK

 

What Hillbilly posted above is probably the root cause as it is well documented. Perhaps @boomers_influence or one of the other Onan gurus can chime in for a better explanation and fix.

 

Close one eye Jeffrey .... yer postin double! :lol:

Edited by WHX14
Speeling
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WVHillbilly520H
3 hours ago, WHX14 said:

 

Close one eye Jeffrey .... yer postin double! :lol:

I must double tapped, hard to to give up those old mafia days :laughing-rolling:...

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elcamino/wheelhorse

@WVHillbilly520H Is that the hillbilly mafia ?

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WVHillbilly520H
39 minutes ago, elcamino/wheelhorse said:

@WVHillbilly520H Is that the hillbilly mafia ?

Yup

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SylvanLakeWH

:text-welcomeconfetti:

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JimmyJam

:text-welcomeconfetti:to :rs:

 

My thought exactly....sounds like a governor problem. I know a lot of governor cross-shaft were plastic and have known to break.

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mgk20181
On 1/25/2018 at 9:18 PM, WVHillbilly520H said:

Yup

yes it definitely was a governor problem. it had a plastic fly ball spacer which loosened up on the shaft so it was allowed to spin.  got it fixed with the help of boomer. 

thanks for all the great replies and info

mgk

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