Marine propulsion device

摘要

A marine propulsion device includes an engine, an exhaust passage, a porous body, a retainer mat, and a stopper portion. The engine includes an exhaust port. The exhaust passage connects to the exhaust port. The porous body is disposed in the exhaust passage. The retainer mat covers the outside peripheral face of the porous body. The retainer mat retains the porous body. The stopper portion is disposed inside the exhaust passage. The stopper portion is disposed downstream of the porous body and spaced apart from a downstream-side end portion of the porous body. The stopper portion extends inwardly in the radial direction, past the outside peripheral surface of the porous body.

主权项

1. A marine propulsion device comprising:
an engine including an exhaust port; an exhaust passage connected to the exhaust port; a porous body disposed in the exhaust passage; and a retainer mat arranged to retain the porous body and cover an outside peripheral surface of the porous body; wherein the exhaust passage includes a stopper portion disposed upstream of the porous body, spaced apart from an upstream-side end portion of the porous body, and extending inwardly in a radial direction past the outside peripheral surface of the porous body; and the exhaust passage includes a coolant passage disposed surrounding the porous body.