Re: 5 HP SEA KING YEAR , OIL GAS RATIO
I'm unable to locate that model number in the Old Outboard Book -- seems unfamiliar for Sea Kings (usually a "GG" designation). But maybe it's a late model. Perhaps made by Chrysler? If it's from the mid-60s or newer, a 50:1 mix would be fine -- but I can't confirm the age for you.