by nelson
(graham,wa.)
I have 1992 bayliner 18ft. 3.0 mercrusier i/o. starts right up but whenever you throole down and put into gear the engine starts to buck and the boat shakes until you give it throtle and then it will start moving and shake stops and engine is smooth again and the boat runns great, until you idle down or turn it off. then starts up and once you put in gear all starts again.