Berryman B-12 Chemtool Fuel System & Injector Cleaner, 15 oz — Concentrated Carburetor Degreaser, Moisture Dispersant

Berryman B-12 Chemtool is a concentrated 15‑ounce cleaner formulated to remove gum, varnish and fuel residues from carburetors, fuel injectors, intake ports and valves while dispersing moisture.

Designed for routine maintenance or targeted fuel‑system cleanups, this 15 oz B-12 formula uses high‑energy solvent chemistry to dissolve deposits that can impair fuel spray patterns and airflow. It’s packaged for easy addition to a vehicle’s fuel tank or for use in service applications where a powerful solvent is needed to restore proper fuel delivery and combustion efficiency. The product is sold as a single 15‑ounce unit in the 4 set 0116 listing.

How does B-12 Chemtool improve fuel system performance?

The concentrated solvents penetrate and break apart hardened gum and varnish that accumulate from degraded gasoline. By removing those deposits, injectors and carburetor bores can return to more precise spray and flow characteristics, which supports smoother idling and consistent throttle response.

• High‑energy solvent technology dissolves stuck deposits quickly.
• Helps restore injector spray patterns and carburetor bores.
• Reduces deposit-related rough idle and hesitation.

When and how should I use this cleaner?

Use Berryman B-12 as part of scheduled maintenance, after fuel system repairs, or when symptoms like rough idle or poor throttle response appear. The product is typically added directly to the fuel tank per manufacturer directions, or used in dedicated cleaning rigs for service bays.

• Add recommended dose to a near‑full tank to ensure even dilution.
• Use after long storage periods to disperse moisture and stale fuel residues.
• Follow vehicle and product instructions for mixing ratios and safety.

What specific contaminants does the formula target?

B-12 Chemtool focuses on common fuel deposits: gum, varnish, and other hydrocarbon residues that build up over time in fuel circuits. It also disperses small amounts of water in conventional gasoline, helping prevent corrosion and uneven combustion caused by moisture pockets.

• Gum and varnish that restrict small passages and orifices.
• Fuel residues that affect spray atomization and fuel metering.
• Minor water contamination dispersed into the fuel stream.

Is B-12 Chemtool safe for modern engines and fuel systems?

When used according to the directions, the solvent formula is compatible with standard gasoline systems, including carbureted and fuel‑injected engines. It’s important to follow dosing guidelines and avoid overuse; excessive solvent concentration can affect rubber components not rated for strong cleaners.

• Formulated for conventional gasoline engines and fuel system components.
• Use recommended amounts to protect seals and hoses.
• Consult vehicle specifications if in doubt about material compatibility.

Who is this for: Mechanics, restoration shops and DIY enthusiasts who service carburetors, fuel injectors and intake systems will find Berryman B-12 Chemtool valuable for removing deposits that degrade engine responsiveness. It’s suited to routine preventive maintenance, pre‑season tuneups, and targeted cleanups after fuel quality issues or extended storage. Professionals will appreciate the 15‑ounce concentrated size for controlled dosing, while hobbyists get a manageable container for occasional use. Always read product instructions and use appropriate protective measures when handling solvents.