Zenith K5A Carb Question

A vacuum leak is a bad thing--makes for hard starting, lean mixture at idle, hard to adjust right for any speed. A thinned out mixture tends to burn hot, so you run some danger of burned valves and general overheating.

This is a repair that I do every now and then. It helps a lot if you can find a new throttle shaft. They are hard to make. I am not familiar with the R2 carb specifically, but I've done this on several Scheblers. I set the carb up in the milling machine and bore the iron "back" bearing to line up with the bushing bore of the "front" bearing. If front and back are both bushed, you have it easy, don't need to bore. Then I make new brass bushings and knurl them so they fit snug without danger of splitting the carburetor.

I don't see why it wouldn't work on the Zenith if it is a cast iron or brass carburetor.

Hi Steve,
I had a K5A rebuilt by a local guy here for my 22 and also a couple of pony carbs for D-2's.
He always rebuses the shafts and makes his own bushings. All of them run well.
I can get his phone number for you if you'd like to consult with him.

Scott

Jack, Scott,

Thanks for the feedback, I'm going to pull out the old bushings and turn some new bushings.

Steve