Berryman B-12 Carburetor, Choke & Throttle Body Cleaner — 20 oz fast-drying, non-chlorinated spray

Berryman B-12 is a fast-drying, non-chlorinated spray that removes gum, varnish, sludge, and carbon from carburetors, chokes, and throttle bodies to restore cleaner airflow and smoother engine response.

This 20 oz aerosol from Berryman has been formulated to cut through stubborn deposits on fuel and air delivery parts without leaving a sticky residue. Engineered for modern and older vehicles alike, the formula is safe for oxygen sensors and catalytic converters while being powerful enough for professional shop use. The ready-to-use spray helps reduce idle problems and hesitation by clearing the passages that affect fuel metering and throttle movement.

How does this cleaner improve starting and acceleration?

Contaminants that accumulate on carburetors and throttle bodies can restrict airflow or interfere with fuel atomization, causing rough cold starts and delayed throttle response. Berryman B-12 dissolves those buildups quickly so the engine receives the correct air-fuel mixture again. Using it can reduce stalling and improve throttle smoothness when applied as directed.

• Removes gum, varnish, sludge and carbon deposits fast.
• Clears throttle bores and choke passages without disassembly in many cases.
• Helps restore consistent idle and smoother acceleration.

Is the formula safe for modern emissions systems?

The cleaner is non-chlorinated and designed to be gentle on catalytic converters and oxygen sensors while still being aggressive on carbon and varnish. Because it evaporates quickly and leaves no sticky residue, there's minimal risk of contaminating sensitive exhaust components when used properly. Always follow vehicle manufacturer and product instructions to avoid over-spraying near sensors.

• Non-chlorinated formulation reduces risk to emissions equipment.
• Fast-drying, no-residue finish prevents sensor fouling.
• Suitable for use on a wide range of gasoline engines and components.

How do I use this aerosol for best results?

Turn off the engine and allow it to cool before applying. Spray directly onto the carburetor, choke, or throttle body components, targeting deposit-laden areas; allow the solvent to loosen grime, then wipe away residue or run the engine briefly to clear loosened material. For heavy buildup, repeat as needed or use light mechanical agitation with a soft brush.

• Spray from a short distance to penetrate deposits without overspraying.
• Wipe excess with a clean rag and repeat for stubborn spots.
• Use protective gloves and eye protection; ventilate the work area.

What advantages does Berryman offer over generic cleaners?

Berryman combines a time-tested formula with professional-grade strength that balances cleaning power and component safety. The brand’s long history and U.S. manufacturing give many users confidence in consistent performance and quality control. The aerosol format is convenient for quick shop tasks and roadside maintenance alike.

• Trusted American-made formula from a legacy brand since 1918.
• Professional-strength cleaning without chlorinated solvents.
• Convenient 20 oz spray for repeated applications and easy storage.

Who is this for: Berryman B-12 20 oz spray is aimed at DIY mechanics, professional technicians, and vehicle owners who need a dependable cleaner for fuel and air-delivery parts. It’s useful for restoring performance on older carbureted engines, maintaining throttle bodies on fuel-injected vehicles, and helping shops speed diagnostics and repairs. If you want a fast-acting, no-residue cleaner that is safe for emissions components, this product suits routine maintenance and targeted cleaning tasks.