Jump to content
mgk20181

engine over revs intermittently

Recommended Posts

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

  • Sad 1

Share this post


Link to post
Share on other sites

:text-welcomeconfetti:

 

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

  • Like 2

Share this post


Link to post
Share on other sites

: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
  • Like 1
  • Haha 1

Share this post


Link to post
Share on other sites
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:...

  • Haha 2

Share this post


Link to post
Share on other sites

: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.

Share this post


Link to post
Share on other sites
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

  • Excellent 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

×