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Model B idling rough

C

CmCantarini

New User
I have been working on my 1948 model B lately. It starts right up and idles fine for about a minute then it starts idling from normal to a little above normal even when driving it. The plate the linkage hooks up to on the carb starts to turn by itself from open to close. i had the carb rebuilt and i put it back on today and it started right up with the choke pulled a little and sounded great and after pushing the choke back in it started to do the same thing. Any help or advice would save me a headache
 
My Choices to fix the problem:

1-Poor fuel flow from tank to carburetor.
2-Carburetor partially clogged in idle circuit.
3-Carburetor not adjusted properly.

Consider these first before starting to throw parts at it. Have Fun!
 
Could be that rod going from the carb to governor is binding somewhere. This will cause the governor to "hunt" Might be happening after the tractor has run for a bit because it is heat related. Anyway I would check your linkages carefully and see if it is rubbing on something, or maybe one of the ends is twisted or bent a little.

Kurt
 
Ok thanks I will take a look. The governor arm does move when it changes Rpms at idling without touching the controls at all [/url]
 
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