I put one of these mercury coils in a 1/2 hp Cub.
Cut off all but 2 of the lams and elongated the holes
to fit. For your motor you only need to leave 1. Had
to file off some of the coil insulation to get it under
the flywheel. I don’t know if that will be necessary on
your motor as the flywheel is bigger.
Tubs
.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.