Tecumseh HM80 Will Not Drop down to Idle

[CCassell]

I have a Go-Kart with a Tecumseh HM80 Engine. The Motor start fine but the engine revs to high and with not drop down to idle. If I manually move and hold the linkage it will run in idle but as soon as I let go of the linkage it revs back up. Don't know if a spring should be pulling the linkage to idle or what? This is a go-kart so the drive puts power to the wheels when the engine starts. Please Help. I got this go-kart used from somebody with this existing problem.

 

[sayre315]

yea, you need a return spring

 

[thatkidrob]

i have the same problem but not as bad, you can usually hold down the brake and it will lower the rpms.

 

[CCassell]

When I hold down the brake the belt starts to burn up

 

[Kenny_McCormic]

Pics of this setup? Is it governed? Sounds to me like ther is gov crap still on it and you tried toset it up as ungoved.

 

[CCassell]

See attachment ....See figure 9
Should the "wire" behind the Linkage be appling force?
it is not in fact it and its tab are are loose on the shaft. Should I try and "wind" it
counterclockwise one turn and try to reattach it?

 

[CCassell]

See attachments ....See figure 9
Should the "Tension Spring" behind the Linkage be appling force?
it is not in fact it and its tab are are loose on the shaft. Should I try and "wind" it
counterclockwise one turn and try to reattach it?

 

[Kenny_McCormic]

Dont bother with any of that stuff, disconnect everything and attach the throttle cable directly to the carb butterfly, add a return spring. The governor is designed to keep it at low rpms for industrial purposes, you can go a lot faster without the governor.

 

[gocartkid]

And be sure your cable assembly isn't binding up anywhere, I had a kart do this and it was right above the point where the clutch engaged, boy it was interesting when I fired that thing up!