Importance

Loading Importance Indicators...

Abstract

A two pathway exhaust and water discharge through-hull system is coupled to a muffler for separating exhaust gases and cooling water at operating speeds such that at low engine speeds exhaust gases and water are discharged through a first outlet preferably above the waterline and, when the engine speed is increased above a predetermined level, exhaust gases are discharged through a second outlet which communicates with a streamlined, low back-pressure underwater discharge skeg and water is discharged through the first outlet. In a preferred embodiment of the invention, a discharge skeg is positioned at each comer of the transom for a twin engined vessel. In a preferred embodiment also, each of the underwater discharge skegs is mounted to the bottom of the hull and includes a mounting flange and an upwardly extending collar which extends through the hull and is coupled to an adapter for coupling the discharge skeg to an exhaust outlet of a muffler. As a result, an exhaust system is provided which is efficient, quite and which discharges exhaust gases underwater and away from the vessel when underway at normal operating speeds.

Loading the Abstract Image...

First Claim