Zenith Carb Question

Anonymous-0

Well-known Member
I have a 40 Farmall A. The zenith carb numbers are 52499D and 9167. At the lower front of the carb is a threaded plug, under the plug is a jet. No adjustment needle??? Am I missing something here? Tractor runs fine, idle adjust did not seem to have much effect. Ive seen drawings showing the plug, or an adjustment needle there. Seems wrong, I want a needle to adjust!
 
Tim, From what I was told only kero/multi fuel tractor needed adjustable main jets.
On gas no adjustment. Oldiron29
 
Thats how there where made for a long time. Did at times cause problems but thats how it is and thats how it was made. Very common on the Bs, As, and C, and probably a lot of others
Hobby farm
 

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