Runaway throttle

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Dusty B
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Runaway throttle

Postby Dusty B » Sun Jul 28, 2013 8:54 pm

Engine starts and runs fine, but w/the throttle completely back it w/gradually keep increasing RPM's up to wide open even though the throttle lever isn't moved?? Where do I look first? Thanks, Dusty B
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Re: Runaway throttle

Postby Cecil » Sun Jul 28, 2013 8:59 pm

Check for slop in the throttle linkage between the governor and the carb.

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Re: Runaway throttle

Postby Hengy » Sun Jul 28, 2013 9:00 pm

Check all linkages from throttle control to the carb. Has the rod come loose between the left side rockshaft and the carb?
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Re: Runaway throttle

Postby Boss Hog » Mon Jul 29, 2013 2:31 pm

check the pin in the gov weights
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Dusty B
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Re: Runaway throttle

Postby Dusty B » Tue Jul 30, 2013 7:16 am

Thanks, forgot to mention that when I do pull back on the throttle lever it w/slow back down temporarily, but then speeds back up when I release the pressure on the throttle lever. Really have to put pressure on to get it to slow down though. Dusty B
Grandpa's '41 B
'56,,'57,'59,'71 Cub
'51 Super C
'55 Case SC
Fairbanks-Morse 3KW Generator
Dad's DB garden tractor
'48 DeSoto
'31 "A Coupe
'51 Ford PU
'55 Dodge PU
God looks out for those of us who don't know how to look out for ourselves!

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Re: Runaway throttle

Postby FCUBMAN » Tue Jul 30, 2013 9:23 am

Sounds like the governor is bad. Boss Hog probably nailed it. The weights are what bring the throttle down when the RPMs go up.
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Re: Runaway throttle

Postby SONNY » Tue Jul 30, 2013 10:51 am

I have two of them doing the same thing,--- only after they have been run and pulled hard and are warmed up! thanks; sonny


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