Just did a tune up on my '85 Mercury 150, rebuild carbs, new fuel lines, water pump kit, replaced all water lines, thermostates, spark plugs, spark plug wires, lower unit gear oil change. Brought the family camping this weekend and I Bass Fished the entire time, and my boat ran great. if there is anything that should be done on a major tune up please let me know, because I dont think anything has ever been done to this outboard before me.