after removing the lower unit to check the water<br />pump impeller,which was fine, and after putting it back together, i cant get the motor to open up to high speed. it trolls fine, but no top end?<br /> i noticed this 9.8 merc has a trolling mode lever. how does this work? could i have misaligned something when i put it back together?<br /> wish i had a diagram on how this all works.<br /> any help is appreciated. 