Good Morning Everybody, Looking for a little help here. Saturday I had my boat out for a couple hour cruise, just putting around our lake. Cruised just up on plane for about 10 minutes. The engine ran like a Swiss watch like usual. Pulled the boat out as I was going to go to another lake. Sat for about about an hour and headed off to the other lake I was going to go to. Dropped the boat in the lake, went to start up and all I got was a click. Not a dead battery starter solonoid click, but a starter engage and it couldn't turn over the engine. Long story short, pulle out of the lake, went back to the cabin, put a wrench on the harmonic balancer bolt to see if I could turn over the engine. Nothing. Got home yesterday and pulled the spark plugs. Water poured out of cylinders 5 and 2, and the other cylinders were damp. With the plugs out I turned over the engine with the starter and water just shot out ouf 2 and 5 and misted out of the others. Anybody have any idea on this? How can the engine run perfectly, not skip a beat one hour, and the next be totally hydrolocked? I would doubt both manifolds rusted out at the same time. The boat runs in fresh water in Minnesota. Could the riser gaskets have failed at the same time? Would that cause this? Any help would be hugely appreciated. Incidentally, the engine has a Volvo closed cooling system on it. Thanks in advance for your help.
