Application guide for carburetor for John Deere styled model D tractor. Send yours for re-conditioning or swap with us. Units are completely cleaned and reconditioned with new parts kit and other parts as required. In most cases, All-Fuel carburetors can be updated to Gasoline. Repairable, restorable core required. See BLOG “Carburetor/Magneto Cores” on this site. Bad or broken stem threads not a penalty. No warranty is expressed or implied.