Zenith 28 IFT 1-Barrel: Overhaul: Disassembly
- Remove retaining plug and filter screen. Remove idle jet. Remove cover assembly and gasket. Lift out plastic float bracket and float. Remove main jet plug and seal, then remove main jet through plug opening.NOTE: Do not remove the two screws holding main jet body to the bowl.
The thermal gasket is not to be removed. Remove idle mixture adjustment screw, and idle speed adjustment screw.
- Remove bolt and spring washer holding fast idle speed adjustment screw and arm in place, and remove arm.NOTE: Fast idle speed adjustment screw is preset at factory.
Remove arm and bushing from throttle plate shaft. Disconnect link between fast idle adjustment arm and throttle shaft arm. Remove screws holding throttle plate in shaft and slide plate from shaft. Slide throttle plate shaft out of carburetor base.
- Remove needle valve and seal assembly. Remove cover from automatic choke, and remove thermostatic spring support block with its metal plate and the thermostatic spring (do not remove spring from the block). Remove metal shield. Remove nut and lock washer holding choke piston to shaft. Remove choke housing with piston and gasket. Remove choke piston from housing. From other end of choke shaft, remove fast idle speed cam cover, and remove choke lever and fast idle speed cam. Remove screws holding choke plate to shaft and remove plate. Remove choke plate shaft and the two spacers from the cover.
- Clean all metal parts in a suitable solvent.NOTE: Do not attempt to clean jets or passages with metal wire or instruments; use only solvent followed by air under pressure.