Re: 1963 10 HP Sportwin
Are you talking about the oil to mix with the gas? That should be any TCW3 grade oil. I get it at Walmart for about $11 a gallon. If you're referring to the lower unit, a marine grade 80-90 weight gear lube. Walmart also has that or you can pay more for the Johnnyrude oil from a dealer. Don't use auto grade - marine grade has additives to emulsify any water that gets in the lower unit.
