It was a Johnson 3.6 300 HP. Bored out to 4 liters, finger ports added, 2 per cylinder. Boyson two stage fiberglass reed valves. Land and Sea dual spark plug high compression heads. Velocity stacks. Modified exhaust. Nose cone on the lower unit. Custom stainless steel engine bracket that moved the engine back 12 inches and put the prop shaft centerline to the keel. 13 1/4 X 29 4 blade stainless propeller. 12 X 24 cast aluminum K-Planes. Hydraulic steering. The boat was George Linder 21 Challenger with a balsa core hull. Wonderful boat in rough water.

Bombardier bought OMC Johnson/ Evinrude. Then they bought Volvo Penta. They make marine drive systems but Etec is dead. Mercury makes the engines marketed as Evinrude and they are 4-strokes...