I have a 93 nissan 90 hp on it's 2nd(Tohatsu) powerhead; for years I've been cleaning the carbs with spray cleaner and blowing out with air. Finally this spring after some encouragement from this forum I soaked one set of carbs(minus the floats and gaskets)in a bucket of Napa carb cleaner, rinsed with hot water, blew them out with 100# air, and reassembled. The difference is amazing.Idle is much smoother and as slow as I want.
