12. CARBURETOR VITALITY 50 Remove the main jet, needle jet holder and Main Jet/Needle Jet Holder/Needle Jet needle jet. Remove the slow jet. Slow Jet Slow Jet O-ring Washer Spring Clean the removed the main jet, needle jet holder, needle jet and slow jet with detergent oil. · Be sure to use clean detergent oil. Check the pilot screw, spring, washer and O-ring for bend, wear or damage. Main Jet Needle Jet Needle Jet Pilot Screw Holder 12-19