Well I finally decided to just go ahead and order my new head for my 85 troop (430 bucks) instead of messing with new engines and what not. I went ahead and pulled the water pump to make sure it was still in good shape and from what I can tell its fine but I don't know hardly anything about water pumps other than they spin an move water. Should I go ahead and replace it now since the motor is basically disassembled all the way or just put the old one back in there? Its not too rusty but its got regular rust on the propeller. Like I said I have no clue about water pumps so whatever you guys think.