Complete Carburetor Repair Kit with Throttle Shaft Fits John Deere 3020 TractorOne New Aftermarket Replacement Complete Carburetor Repair Kit with Throttle Shaft Fits John Deere Tractors This carburetor repair kit restores proper fuel delivery on Fits John Deere tractors equipped with a Zenith carburetor. The kit includes all critical wear components gaskets, needle, seat, and throttle shaft needed to rebuild the Zenith carb to like new function. Verify your Zenith carburetor model number against the list below before ordering.