Hello. I bought the above machine in non-running condition at an auction and do not know much about its history. 136 hours and in excellent cosmetic condition. Oil in the tank is clean. Plugs looked good. Pulled the plugs and discovered salt water in the cylinder closest to the rear of the machine which I withdrew. Sprayed PB Blaster and then Sea Foam Deep Creep into all of the cylinders and let it sit for a few days. I put a new gsm battery in it and everything powers up including the fuel pump. When I push the start button, the starter makes a clunking type noise but will not turn the engine over. I put a chain wrench around the coupler and the engine still will not turn over even after exerting a medium amount of force. Looking for some thoughts about determining whether the engine is the problem, the jet pump is stuck or whether the starter/auxiliary gear are stuck against the flywheel. Any help is appreciated! Thanks, Bill.