New OEM Yamalube Outboard 12oz Ring Free Plus Fuel Additive, ACC-RNGFR-PL-12

I have a 1998 S115 and I have used this religiously after reading that it is a necessity for Yamaha outboards. Between the use of this in my fuel and attention to carb cleaning I have had zero issues.

Combustion engine? Running rough or hard to start? Simply stated this stuff works. Used in wave runner as well as gas leaf blower and lawn mower. Use Yamaha ring free in conjunction with this and somehow it works with a fresh tank of gas.

Great value for this product.

The best engine combustion decarbonizer! I used Yamahas ring free on a 2014 Subaru Outback with a 2.5 that started consuming oil. Then I realized this oil consumption was causing my engine to have a slight ping around 2000-3000 RPMs. I learned that oil burning carbonized my combustion chamber hence caused carbon to make my engine ping. My car had the ping for about 3 years and it was getting worst. I tried Sea foam and Chevron Techron and they both helped and they are good products but the pinging was still there.Yamaha Ring free has for the first time gotten rid of my pinging problem. I did use it as shock treatment though which requires you to add 2 oz per gallon of gas in your gas tank. It goes in your gas tank so it also cleans injectors. Which would explain why my engine is running so smooth.On top of my engine smooth it has regained new power. Very happy with product. Thanks!

Great for my yamaha outboard. Runs better and better since we adopted it.

I swear by it . Have owned 2 Yamahas…………a 150 and a 250. Small investment to have engine at top performance …………they’ve run flawlessly for 100’s of hours.

EXCELLENT PRODUCT ONLY PROBLEM WAS LONG SHIP TIME

So far it seems to be helping. My shop manager has 20 years experience as a manager at yamaha and recommended it. He also recommend going heavy(1 ounce per 3 gallons) they 1st two tanks. Then I bought a 1/3rd ounce measuring spoon to add the remainder of the bottle. I will update after treatment. It still hesitates on cold mornings the 1st few miles. He said it should clean it up.