I went to take off on lake Michigan yesterday just began to get up on plain all of sudden RPM take off and boat loses all froward and reverse. Seems to be going in to gear both forward and reverse just no movement. should of checked if prop was spinning in water but didnt. So i get towed in after being a drift for some time. i take the boat out of the water and put it in gear i can spin prop both ways seems i have striped prop. Does this sound like could be my problem? any thing else i should check? Boat is 91 350 merc Alpha 1 drive. I would also like to thank the guy who took time out of his day to help me and refused the $100 i offered for the tow in. Mostly all good people on the water