Marine propulsion device exhaust system

Abstract From the Canadian patent

Disclosed herein is a marine propulsion device comprising a stern drive unit including a gimbal housing adapted to be fixed to a boat transom. a gimbal ring connected to the gimbal housing for pivotal movement relative to the gimbal housing about a generally vertical axis, a propulsion unit connected to the gimbal ring for pivotal movement relative to the gimbal ring about a generally horizontal axis, an exhaust gas passage in the propulsion unit and including an outlet normally located under water and an inlet normally located above the water, a flexible exhaust gas bellows having a rearward end connected to the inlet of the exhaust gas passage in the propulsion unit and having a forward …