Exhaust silencer for outboard engine with a reflection chamber

摘要

An exhaust silencer for an outboard engine including an expansion chamber for reducing the exhaust noise. A reflection chamber having an open end and a closed end is placed with its open end communicating with the expansion chamber at a location which is reversely spaced from the open end of an exhaust pipe discharging into the expansion chamber. This enables the engine to be operated optimally in a plurality of engine speed ranges and for the silencer to occupy a minimal volume.