I borrowed my brotherinlaws 6 hp 1976 fisherman for a fishing trip this weekend. It iddled rough, but after i tightened the gasket around the lowspeed adjust - perfect. When home after trip, i let it iddle in harbor. This thing iddles like a 4 stroke!! I let it run 5 min, it didnt even miss one beat. Now to the piont: He never cleaned or rebuild carb, nor took anything apart on this motor. He never drains carb after use or wintherizes in any way. He changed impeller 5 years ago for first time ( we had to grind it of driveshaft ) It runs like a champ - he dont deserve it !!