Correct oil/gas mix

My buddy's 2008? yamaha 9.9 runs on 100:1. He says leaner the meaner lol, I won't go on big lakes with him. I run my 1980 evinrude 9.9 at 40.1 amsoil. I would be asking manufacturer if I was using a new engine.

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50:1 and don’t worry about it.

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Originally Posted by Woodsman

I think for 100 to 1 you are referring to Amsoil Sabre not designed for outboards though. That's is made for small engines like chainsaws.
Amsoil marine oil is 50 to 1.

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I think you're right but I still mix it at 50:1 for my small engines. Plus I use Sea Foam in everything