WD-40 Specialist Fast-Acting Carb/Throttle Body & Parts Cleaner is the only all-in-one carburetor cleaner spray you will need to clean your carburetor, throttle body, and unpainted metal parts. What makes WD-40 Specialist Fast-Acting Carb/Throttle Body & Parts Cleaner unique is the DUAL-ACTION CLEANING SYSTEM. First, the powerful solvent cleaning formula breaks up tough, baked on carbon deposits. Second, the powerful cleaning spray blasts away the deposits and waste, leaving behind no residue. The results are engines that start up fast and easy, and levels to a smooth, consistent idle with less stalling. The carburetor cleaning spray is perfect for both old and new vehicles and equipment including; Cars, Trucks, Tractors, Motorcycles, Boats, Lawn Mowers, Weed Trimmers and all other gas powered lawn outdoor equipment. Will not affect oxygen (O2) sensors or catalytic converters upon incidental contact.