Berryman Carburetor, Choke & Throttle Body Cleaner — 20 oz Spray, Non-Chlorinated Fast-Drying

Berryman B-12 Carburetor, Choke and Throttle Body Cleaner is a fast-drying aerosol that dissolves gum, varnish, sludge, and carbon from carburetors, chokes, and throttle bodies to restore airflow and smoother engine response.

Whether you’re troubleshooting rough idling or doing routine maintenance, this 20 oz spray from Berryman offers a non-chlorinated formula designed to cut heavy deposits without harming oxygen sensors or catalytic converters. Manufactured in the USA and used by professionals and DIY mechanics, the B-12 cleaner works quickly so you can see results without lengthy disassembly or waiting periods.

How does Berryman B-12 remove stubborn deposits?

The formula combines strong solvents that penetrate and dissolve varnish, gum, and carbon buildup commonly found in carburetors and throttle bodies. It loosens sticky residues so they can be blown or wiped away, reducing airflow restrictions and improving part movement.

• Rapid solvent action breaks down varnish and gum.
• Spray-and-go application for in-place cleaning.
• Fast-evaporating, leaves no sticky residue.
• Non-chlorinated to be safer for modern engine components.

Can I use it without removing parts from the engine?

Yes — Berryman B-12 is formulated for effective in-situ cleaning so you can address choke plates, throttle bores, and exposed carburetor components without full disassembly. Use targeted sprays while following safety precautions and the vehicle maker’s service guidance.

• Direct spray access for exposed throttle bodies and carburetor openings.
• Reduces downtime compared with complete teardown cleaning.
• Works on both carbureted and some port-injected systems where access is safe.
• Allow parts to dry before restarting engine to avoid run-on or flame risk.

Will this cleaner harm sensors or the catalytic converter?

Berryman B-12 uses a non-chlorinated solvent blend intended to be safe for oxygen sensors and catalytic converters when used as directed. Avoid saturating downstream components and follow manufacturer recommendations to minimize exposure of sensitive parts.

• Non-chlorinated formula reduces risk to catalytic systems.
• Designed to evaporate quickly with minimal residues.
• Avoid excessive overspray toward sensor housings or exhaust inlets.
• Follow vehicle-specific cautions for sensor-proximate cleaning.

How will cleaning with B-12 affect drivability?

Removing accumulated deposits helps restore consistent airflow and cleaner throttle operation, which often translates to smoother idle, reduced stalling or hesitation, and improved throttle response. Effects vary by vehicle age and severity of deposits, but many users notice immediate improvement after cleaning and a brief run-in period.

• Can reduce rough idling and uneven throttle response.
• Helps eliminate hesitation during acceleration caused by restricted passages.
• May improve cold starts by clearing choke components.
• Short drying time means quicker testing and reassembly.

Who is this for? Berryman B-12 is aimed at automotive technicians, restoration hobbyists, and DIY car owners who need a dependable aerosol cleaner for carburetor, choke, and throttle body maintenance. It's particularly useful when deposits are causing drivability issues but a full rebuild isn’t yet required. Always use with proper ventilation, protective gear, and follow vehicle manufacturer safety and service instructions.