'Afternnon John Reynold,<br /><br />others can confirm but i think you're looking at 24:1<br /><br />Good Luck<br />HAVE FUN!<br /><br />P.S. i love these old motors!
The title says 18hp and 1955 as the year. I think something's amiss with the title. According to the number: 183021e02567 I reckon it's 18hp, but what about the year?
John<br />You have a 1963 18HP Evinrude. This can be confirmed at the site below. This is the 2nd site I have come up with a 1963 Model, along with the one I posted before. So I can only assume the title is incorrect. Your Model # is 18302.<br /><br /> marinshopen
The oil ratio for a 1963 engine is open for argument. In 1964, OMC went to advising a 50:1 ratio. But, the internals of the engines did not change.<br /><br />If I were you, I'd use something between. The 24:1 is overkill.
