Try tapping on the starter. If it cranks its likely just
poor contact of the brushes. This friend of mine
has been beating on his starter with a rock to
get this to crank over. Once he gets it started the
first time its fine the rest of the day. I know but
its his motor.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.