The 115 hp and 150 hp versions of the Rotax outboard share a 1.9-liter three-cylinder, two-stroke powerhead, with the 150 gaining variable exhaust ports for a power boost. Evinrude models featured the ...

Cutaway of Rotax 150 outboard shows the horizontal three-cylinder powerhead and sealed cowl. Air enters the cowl through the snorkel at the front top of the cowl. Courtesy BRP. A 1.9-liter ...