I have no idea what happened. I was cruising along in the middle of the lake at about 30mph and it was running strong and making great power. It started to stutter a little bit and then it just quit. I tried hitting the starter button and I could hear the solenoid but the motor wouldn't budge. Some people in a ski boat saw me dead in the water and were nice enough to give me a tow back to the ramp. Got it in the garage and pulled the spark plugs out. I can't move the pistons with a screwdriver and it looks like the engine seized. I sprayed some PB blaster down the cylinders to see if I could break it loose but I'm not holding out much hope for that. I suspect that I may have sucked up some debris that clogged the cooling lines and it got hot but I'm not sure. Do you guys have any advice or should I just bite the bullet and pull the engine out of the hull for a rebuild?