WD-40 Specialist® Carb/Throttle Body & Parts Cleaner with attachable precision straw is the only all-in-one carburetor cleaner spray you will need to clean your carburetor, throttle body, and unpainted metal parts. What makes this cleaner unique is the dual-action cleaning system. First, powerful solvents breaks up tough, baked on carbon deposits. Then, 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 level to a smooth, consistent idle with less stalling. This formula is proven to improve performance at high RPMs. Great for both old and new vehicles and equipment, including; cars, trucks, tractors, motorcycles, boats, lawn mowers, weed trimmers, and other gas-powered lawn outdoor equipment. Safe for use on most unpainted metals and will not affect oxygen (O2) sensors or catalytic converters upon incidental contact.