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Have what I think is a fuel problem in my 37 T20. Tore the carb apart to clean it and I happened to have some carb parts from my 38 parts machine nearby. For some reason I noticed the venturi's looked to have different sized openings. Sure enough, the carb venturi I was running has about a .010 bigger throat than the other. Makes me wonder which one is correct. Anybody know if there is a venturi dimension difference between a K5 on an F20, T20, and F30? If I do happen to somehow have an F30 venturi would there be any benefit to running it in my carb since I have the engine bored to 4"? All I have is a T20 parts book and that lists the venturi as 22838D.

Overhauling my mother's 544 AGAIN. This time we're at .060 over. I've never done anything with the carburetor, but it seems like it's time. Has anyone ever drilled the high speed jet in the carburetor to compensate for the larger bore? If so, how big did they make it?

Has anyone installed an overflow tube in the carb float bowl? Specifically for the Marvel Schebler TSX series, I'd be very interested in any info or tips on this from someone who has done it. The background - I've had an ongoing problem with flooding on my IH 444. I know I need to go over the whole fuel system, tank to inlet screen, to make it clean, but I figured this would be a useful backup. With an overflow tube, if the needle or float does get stuck, the gas would run out on the ground instead of into the intake manifold, stalling out the engine. (And trying to restart a flooded engine has resulted in ignition problems as well). I've done this on a motorcycle before, a Kawasaki Concours. Known for an occasional bent connecting rod from a combustion chamber full of liquid gasoline after the gas petcock went bad and the float valve also stuck. So it was a fairly common mod in the group of Concours owners, as insurance against engine damage. The basic idea is drilling out a hole in the bottom of the float bowl, and pressing in a brass tube. The top of the tube has to be higher than the normal fuel level. But on the Concours, I had instructions from someone who had done it and documented it. Very handy. So if someone has experience with this on a carb similar to what I have on my 444, I'd sure appreciate hearing from you! Keith

Just registered, Happy to find a blog where others suffer likewise! Have just purchased a TD6 with blade. It seems to have a carburetor problem. Where can I find information on the carb and parts to rebuild? I was told it is a 1958. The build info cannot be read. Thanks for any info. Enjoyed reading sugarmaker's thread on his TD6.

I have a 1949 farmall cub that I am having the toughest time getting any sort of throttle variance at the throttle control. I have adjusted the linkage, the carburetor Idle screw and the governor adjustments. I'm not looking to have a hot rod or anything but I do want to figure out how to have some control over the throttle. Does anybody have any tips or tricks on how to get a little bit better throttle control?