Quinton Hazell QH2 Carb / Air Intake Cleaner 600ml is a powerful solvent-based degreaser designed to remove oil, grease, and stubborn gum deposits from metallic components in carburettors and fuel injection systems. It is suitable for cleaning carburettor bodies, air control valves, throttle bodies, brake parts, nail gun mechanisms, and air intake butterfly valves/automatic chokes without the need for dismantling. This cleaner dissolves oil and grease deposits, softens and removes fuel deposits, and helps restore engine performance. It is safe for use with oxygen sensors and catalytic converters. To use on carburettors, set the engine to fast idle and spray into the throat and butterfly assembly, collecting run-off. For induction systems, switch off the engine, disconnect the induction tube, insert the extension tube, and spray until clean. For general use, spray liberally from 20 to 30cm. QH2 formula effectively removes fuel, oil, grease, and gum deposits from carburettors, air intakes, and fuel injection systems for peak engine performance. It is perfect for cleaning carburettors, throttle bodies, air filters, and intake manifolds, making it a versatile addition to any automotive toolkit. By eliminating buildup, this cleaner helps restore smooth engine operation, enhance throttle response, prevent rough idle, and improve fuel efficiency. The fast-acting, residue-free formula evaporates quickly. The 600ml can features a 2-in-1 smart straw for both wide and precision spraying.