Outboard motor exhaust system

Details Outboard motor exhaust system Outboard motor exhaust system

B - Operations, Transporting

63

H

B63H 20/24 (2006.01) B63H 20/26 (2006.01)

Patent

CA 2517557

In an outboard motor exhaust system having a first exhaust gas passage discharging engine exhaust gas into water and a shift actuator operating a shift mechanism to establish one from among a forward position, a reverse position and a neutral position, there are provided a second exhaust gas passage branched from the first exhaust gas passage at a location above the water and an exhaust valve installed in the second exhaust gas passage and connected to the shift mechanism to be opened when the reverse position is established. The exhaust valve is alternatively opened by an exhaust valve actuator installed separately from the shift actuator. With this, it becomes possible to prevent the decrease in thrust produced during reverse boat travel by the engine exhaust gas being sucked in by a propeller, without degrading shift feel.

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