Thanks for the info. Earlier this summer my teenage son left the drain plugs out and the machine was full of water. Bailed it out, cleared out the motor and exhaust, and it ran fine the rest of the summer. I checked and the exhaust hose appear not to be leaking. Could the flooded engine compartment cause a drive shaft seal to start leaking?
I think he means run it on the trailer with water hooked to it. You cuold then see If water comes through the exhaust hoses. I don't see how water inside could cause a seal to go bad. There are other holes to look at. Steering and trim cables, wires for the speedo sender. If you have trim, there is a boot on the outside that can go bad. That can be a pain to find. Good luck.