I can recommend the 4-stroke Mercury 9.9 "Bigfoot". Just installed one in the well of our 6800lb
sailboat. This motor has the lower gearcase from the 15hp motor and a four-blade prop. Quiet,
surprisingly powerful thrust and the boat still achieves hull speed despite the size of the prop. A
major upgrade from the 2-stroke 15hp Johnson that we used to have. Gotta go...Georgian Bay looks
beautiful this morning.