I just bought a boat with a 75' 20hp Mercury outboard. The motor seems to start hard, many pulls and use of starter fluid required. When it's running the top end seems to be there, but it makes short cut outs when wide open. Some times when held wide open it will almost die then catch itself and keep going. When at a slow troll it runs fine. This is what i have done to the motor so far.<br />1. Emptied gas can and cleaned it out, new gas and oil 50:1.<br />2. new fuel line and squeeze bulb.<br />3. new plugs, spark looks dull but ok.<br />4. compression test 90psi and about 100psi on the two cylinders.<br />5. took carb off cleaned it with carb cleaner best i could.<br />Engine is having the same problems before and after i worked on it. <br />So, is it electrical, timing, or carb? I bought the Seloc manual for it, but it doesn't really have a good trouble shooting guide.<br />any suggestions would be appreciated.<br />Thanks.
