Oil Ratio for Yamaha 40

Can you tell me the gas to oil ratio I should use on the above motor , it's a Yamaha  91?

 

100 to 1 in that motor. 50 to 1 is fine also, but with the tolerances the Yamaha is built to, 100 to 1 was the factory recommended ratio.

Randy

 

 

Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Thanks,
Mark C.

 

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