help, is this normal

[mitch5777]

Is this normal for JD B

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Hi, just purchased a 1950 JD model B..it runs great, had the distributor
rebuilt and carb tuned. The question is, when I run the tractor in 5th gear
and go down a grade in the road, the tractor idles down even with the
throttle lever in 3/4 open. Is the govener kicking in, or is it starving for fuel?
as soon as it slows down, the speed picks up and runs great.
It doesnt miss when it slows down, it just acts like I have pulled the throttle lever back.
Any help will be greatly appreciated.
Newbie here to tractor collecting
thanks

 

[dex3361]

Sounds like the govener kicking in, from what you describe.

 

[KWentling]

I would agree that it is probably the governor trying to keep the engine rpms the same. If it actually does drop engine speed I suppose it could be the float in the carburetor. Spent quite a few hours on a B and a 60 when I was a kid (they weren't all that old back then either).

Kim

 

[Soundguy]

Ditto what the others said about slowing down.. my be float hang.

that got the cyclone carb on it?

soundguy