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Looking for a replacement throttle valve.

M

Mr. Farmall

Member
Looking for a replacement throttle valve for the Zenith carb on my A. None of the old tractor parts vendors seems to carry them, any ideas?
 
Is that the throttle valve, aka throttle plate, aka throttle butterfly? Do the Zenith rebuild kits from YT, have them? Thanks.
 

The diameter of the throttle bore can vary somewhat from one carburetor to another, even though they are identical in every other way. Because of that variance, the throttle plate from one carburetor will not necessarily fit in a different carburetor, and that is why a rebuild kit DOES include a new throttle shaft, but does NOT include a throttle plate. Farmall H and Farmall M are the same way.
 
(quoted from post at 20:22:04 06/16/16) throttle shaft you use your old butterfly mine cost 18.95
Click to expand...

My shaft is ok, the butterfly is deformed and needs replacing. It doesn't even fit in the bore right, looks like it got badly gouged on one side somehow by the shaft bushing bore, maybe sidethrust. This is one of the new Zeniths YT sells, the butterfly is cheap aluminum instead of brass like the old Zeniths.
 
(quoted from post at 10:08:00 06/17/16)
(quoted from post at 20:22:04 06/16/16) throttle shaft you use your old butterfly mine cost 18.95
Click to expand...

My shaft is ok, the butterfly is deformed and needs replacing. It doesn't even fit in the bore right, looks like it got badly gouged on one side somehow by the shaft bushing bore, maybe sidethrust. This is one of the new Zeniths YT sells, the butterfly is cheap aluminum instead of brass like the old Zeniths.
Click to expand...

Hammer it flat. Use a file to shape it to the bore. It CAN be done. Keep in mind that the edges ARE beveled to allow a perfect fit.
 
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