Oil/Gas Mixture for 1974 Evinrude 9.9 hp

[Chip]

I just installed the 9.9 hp Evinrude as a "kicker" on my boat and realized that I don't know the oil/gas ratio for this used motor. Can anyone give me the answer?<br /><br />Chip

 

[Dunk]

Re: Oil/Gas Mixture for 1974 Evinrude 9.9 hp

OMC went to 50 to 1 on all engines in 64-65. A word of advice. If you are going to use that engine as a kicker where she's runs hard all the time I'd keep about 40 to 1 mix in the tank for her and don't forget to clean her out with some OMC Engine Tuner or Seafoam to remove the carbon every 30-40hrs running time.