I recently bought a boat that has a 1974 115HP Johnson O/B installed. The previous owner tells me he used one quart oil for every 6 gallons. According to my Clymer Shop Manual, I should be using one pint to every 6 gallons. I read about a gazillion previous topics referring to fuel/oil mixture and now I'm more confused than ever. I'm leaning toward using the one quart, since the engine must be accustom to running with that particular mixture. It seems to me that in this case "more is better" since obviously there's more oil to lube the engine. Any comments?
