My engine was running great at about 15 knots when it cut out. It seemed it could have been a fuel line issue but was not. It then would not crank. It tried to crank with the fly wheel moving a little and seemingly being locked up. Battery was not the issue nor was it in gear or the safety switch out. It is a 200 hp 1989 outboard that was previously running fine and never failed to crank this summer. Any help?