YAMAHA Yamalube Ring Free PLUS Outboard Fuel Additive 12 oz — Cleans Injectors & Prevents Ethanol Corrosion

Yamalube Ring Free PLUS Fuel Additive is a 12-ounce marine fuel treatment that cleans combustion chambers, fuel injectors and carburetors while helping prevent ethanol-related corrosion.

Designed specifically for marine engines, this Yamaha-formulated additive combines deposit control with corrosion protection to maintain performance in outboards. It targets stubborn deposits in intake ports, valves and injectors, and helps reduce the risk of ethanol sulfate salt corrosion on fuel-system metals. Packaged in a convenient 12 oz bottle, the treatment is easy to add to fresh or stored gasoline for routine maintenance or seasonal storage.

How does Ring Free PLUS improve engine performance?

The formula loosens and removes carbon and varnish that accumulate on injectors, carburetor passages and combustion chambers, helping restore smooth fuel flow and consistent combustion. Cleaner fuel pathways reduce rough idling, hard starts and loss of power caused by deposits.

• Removes deposits from injectors, carburetors and combustion chambers
• Restores consistent fuel spray and atomization
• Helps recover lost throttle response and idle stability

Will this protect my fuel system from ethanol damage?

Ring Free PLUS includes chemistry aimed at combating ethanol sulfate salt corrosion, which can form when ethanol-blended fuels interact with water. While it doesn’t change fuel composition, the additive helps protect metal surfaces and slow corrosion processes associated with ethanol exposure.

• Helps guard fuel-system metals from ethanol sulfate salt corrosion
• Reduces risk of corrosion-related component degradation
• Useful for ethanol-blend fuels commonly sold at marinas

How do I use the 12-ounce bottle for marine maintenance?

Dosage is designed for ease: add the recommended amount of Ring Free PLUS directly to the fuel tank before filling, or when treating stored fuel. It can be used as part of regular maintenance or a seasonal fuel-stabilizing regimen to keep systems clean and protected.

• Pour directly into fuel tank following label directions
• Use prior to storage to reduce phase separation risks and oxidation
• Compatible with routine Yamaha outboard maintenance schedules

Is this product suitable for all marine engines and fuels?

Ring Free PLUS is formulated for marine applications and works with gasoline used in outboards, including ethanol blends. It’s intended for fuel-system cleaning and protection but should be used as directed; consult your engine manual for any model-specific recommendations.

• Made specifically for marine gasoline engines, including outboards
• Effective with ethanol-blended fuels commonly encountered at marinas
• Follow Yamaha and engine-maker instructions for best results

Who is this for: Boat owners and marine technicians who want an easy, proven way to keep Yamaha outboards running clean and protected. If you store fuel seasonally, run ethanol-blend gasoline, or want to maintain injector and carburetor cleanliness without disassembly, this 12-ounce Yamalube Ring Free PLUS bottle is a practical maintenance product to include in your service routine.