Put our Moomba LSV with Indmar 340 Assault in the lake to start the summer, but failed to reattach the hoses to the impeller. My son took it out on the lake and it started smoking. He came back to the dock slowly and I attached the impeller hoses. Took it back out on the water and it started smoking again. Realized there was another hose that was detached so I reattached it and turned off the engine. Both nylon exhaust fitting elbows melted and detached. The engine will not crank - it does not even try to start.

So, is the engine seized? Is there a safety/shut-off function that has kicked in? Any troubleshooting tips?