WD-40 Specialist Carb/Throttle Body & Parts Cleaner — 13.5 oz 6-Pack, Fast-evaporating Solvent for Baked-on Carbon

WD-40 Specialist Carb/Throttle Body & Parts Cleaner is a powerful solvent spray designed to remove baked-on carbon, oil, and grime from carburetors, throttle bodies, and unpainted metal parts quickly and without leaving residue.

This aerosol formula combines aggressive solvents with a targeted spray action to dissolve and eject heavy deposits that restrict engine airflow and performance. Packaged in a 13.5-ounce can and sold here in a convenient six-pack, the cleaner is formulated to work on a wide range of gasoline engines and outdoor equipment, helping restore smooth idle and easier starts without harming oxygen sensors or catalytic converters from incidental contact.

How does this cleaner remove baked-on carbon and grime?

The product uses a two-step cleaning approach: solvents penetrate and loosen the carbon and oily buildup, and then the spray forcefully removes the loosened material. Because the formula evaporates cleanly, it leaves little to no residue that would interfere with sensors or fuel systems.

• Solvent action breaks down stubborn deposits at the molecular level
• High-velocity spray powerfully dislodges loosened debris
• Fast-evaporating formula minimizes leftover film or contamination

What parts and machines is it safe to use on?

This cleaner is intended for unpainted metal components on both older and newer gasoline-powered machines. Typical applications include carburetors, throttle bodies and a variety of metal parts found on vehicles and small engines.

• Cars, trucks, motorcycles and marine engines
• Lawn mowers, tractors, weed trimmers and other outdoor power equipment
• Unpainted metal engine components and service parts

Will this affect sensors or emissions equipment if it contacts them?

Incidental contact with oxygen (O2) sensors or catalytic converters should not cause damage with this formulation, as it evaporates cleanly and is formulated to be safe for use around emissions components when used as directed. Avoid deliberate soaking of sensitive electronics and painted surfaces.

• Safe for incidental contact with O2 sensors and catalytic converters
• Avoid prolonged exposure to painted or plastic surfaces
• Follow safety directions on the label to prevent damage to non-metal parts

How does using this cleaner affect engine performance?

Removing build-up from airflow and fuel delivery components helps restore consistent idle, reduces stalling, and can improve throttle response and high-RPM performance. Regular cleaning can help engines start more reliably and run smoother under load.

• Promotes faster, more dependable starts
• Helps stabilize idle and reduce stalling episodes
• Can improve high-RPM responsiveness and overall engine feel

Who is this for? This six-pack is well suited to DIY mechanics, fleet operators, small engine repair shops, and homeowners who maintain multiple pieces of gas-powered equipment. If you service cars, motorcycles, lawn and garden tools, or marine engines and need a dependable, residue-free solvent to clear carbon and oil fouling, this WD-40 Specialist cleaner provides an efficient, ready-to-use option in a value pack.