Re: Fuel Oil Mixture '64 Evinrude 5.5 HP
That is the year that OMC came out with their 50:1 oil. The spec for your motor was 24:1. Or, 50:1 but ONLY if Evinrude or Johnson 50:1 oil was used. Now, bear in mind that the 50:1 oil in those days is not the same formula as the present stuff. Bottom line: The subject always starts a big arguement. Be safe and use 24:1. The little piddling amount of extra oil isn't going to break anyone. If you had a gas guzzling big motor, I might say differently.