I have a (had) a perfectly running 35... i was flushing it with muffs, they slipped off the lower unit amd it overheated. I started it back up and it ran fine with only a slight drop off in **** tube pressure. Took the boat out several times since w/no problems. took it out this a.m. and it overheated badly. pulled the foot and there was very little left of my impeller fins. how bad did i screw it up, will i need to pull head, water jacket etc to clean them out? i have browsed this forum on several occasions and can almost always get my questions answered. thx for any insight, bdk