Went out to ride my ski yesterday, started the engine and got 10 feet from the dock and it abruptly shutdown. Engine will not turn over with the starter or by hand at all. Pulled the cylinder head and everything looks fine. Moved the engine forward to check to see if the issue was in the jet drive. Jet turns fine. I found nothing hanging out of the sides of the engine. Engine was rebuilt last year with new crankshaft, new pistons, rings and wrist pins. Anyone have an thoughts before I remove the engine for complete disassembly? Thanks for any input.