Marvel Carb: Installing new throttle shaft

B

Banditorama

Senior Member
Do I just cut the old throttle shaft out and remove it to install the new one? Or is this the wrong part?

Going into a marvel carburetor
 

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petew said:
Is that a Marvel specific shaft ? Is it oversized , and is it from Renners ?
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Yes, marvel specific. The marvel carb only has one screw to hold the throttle plate in place.

It is not oversized and yes it came from Renner's Corner.

I didn't see any oversized ones and renner's seemed to be the only one that had the shaft. The original throttle shaft in mine was a little over a thousands of an inch smaller in diameter compared to the one I just bought. The old one had just a smidge of play if you wiggled it back and forth.

The bore in the carb body was in good shape, so I just left it alone instead of boring it out and putting bushings in it. Car runs smoother and runs better with the GAV closed about 1/4 turn less than what I used to keep it at.
 
Grind or mill off the upset / swaged / peened part off and tap the old shaft out of the lever arm. You will see that it is the same shape as the new. The new shaft has a screw holding the lever on now. It would take special orbital forming machinery, tooling and a supporting collet to put it back together like it was done originally.

Most of the time a standard shaft will fix up carburetors, it's usually the shaft that wears not the housing.
 
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