[sootman]

I've resealed my intake manifold and put everything back together and started it up but it revs way up. The only way I can control it is to push the governor arm towards the front or the tractor. That's the only way I can control the revs.

When I reassembled the linkage I couldn't remember where or how the front was hooked up to the carb. Here a picture of the linkage:


I remember where it was in the back by the governor shaft but not up front. If I hook it up as what I think is correct the spring and linkage open the butterfly wide open. Can anyone give me a suggestion? It doesn't make sense to me that the butterfly would be positioned furtherest away from the idle adj screw,

Thanks in advance for any help.

 

[dave_thompson]

Steve when you hook the link up at the carb it looks like its in the full throttle position,but when you start it up it moves back to the idle position. Dave

 

[boomers_influence]

steve
you have it hooked WRONG on the throttle shaft end.
the bottom of the J goes into the carb.
you are not the first to do it.
many customers switch to the earlier rod,
it still used the spring.
i do stock the early one.
e/mail [email protected]
or call 651 437 2826
thank you. boomer

 

[sootman]

Dave, thanks for the info, that makes more sense.

Boomer, I finally figured that out and got the beast reassembled and running. It's much better and smoother than before. I haven't noticed much if any surging (that's why I had everything apart in the 1st place). I had resealed the intake and replaced the gaskets on the intake and exhaust manifold and cleaned the carb.. I may have the idle too low as after running at full throttle like when mowing and then I pull the throttle back to idle the engine stutter a bit but if I just pull the choke out about 1" and immediately push it back in it idles smoothly from there on out.

Thanks for the help from you both.

 

[akaothermick]

The "surging" is this describing a lean surge condition where the engine accelerates and stays at a higher RPM than the throttle called for or is it a term used on WFM to describe a hunting idle as explained in the Onan manual, where the idle speed lopes higher and lower, and is not steady, I have never quite understood which condition it is describing.

 

[chuckv]

Mick,

My Onan engine manual only describes "hunting" in terms of a poorly adjusted or worn governor linkage as seen here:
Check the governor arm, linkage, throttle shaft, and
lever for binding condition or excessive slack and wear
at connecting points. A binding condition at any point
will cause the governor to act slowly and regulation will
be poor. Excessive looseness may cause a hunting
condition and regulation could be erratic. Work the arm
back and forth several times by hand while the engine is
idling to check for above conditions.


This is by no means "official" but my understanding of surging as used on this site is the temporary over-speed of the engine at idle when the fuel to air mix is too lean forcing the governor to open the throttle plate -- which speeds up the engine enough that the throttle is then closed by the governor and the cycle repeats. This mix error can be from a fresh air leak below the throttle plate (worn throttle shaft bushings, failed manifold gasket, or more commonly a leak in the two part intake manifold from a failing seal...) or from a plugged low speed jet. Either can produce a lean mix at idle but seem nearly normal at WOT governed working RPM. JMHO

Chuck