Marine-drive exhaust-gas system

摘要

A surfacing marine drive has a drive housing 20 with a fore exhaust passage 230 forward of a vertical bore 26 housing the driveshaft 36, right and left exhaust passages 232 and 234 extending rearwardly from the fore exhaust passage 230 on opposite right and left sides of the vertical bore 26, and an aft exhaust passage 238 extending rearwardly from the right and left exhaust passages 232 and 234 and aft of the vertical bore 26 and discharging exhaust into dual counterrotating propellers 12 and 14.