Suzuki Motor Corporation

Suzuki Kabushiki Kaisha

Yoshiaki Yuda

Mitsuhiko Ohta

Takuya Sato

Atsushi Noda

An outboard motor generally comprises an engine holder to be mounted to a hull, an engine disposed in an upper portion of the engine holder in a mounted state thereof, an oil pan disposed in a lower portion of the engine holder, and a drive-shaft housing disposed below the oil pan and adapted to house a drive shaft of the engine, in which an exhaust gas from the engine is guided to the drive-shaft housing through an exhaust gas passage and the exhaust gas in the drive-shaft housing is discharged outward through an exhaust release passage connected to the drive-shaft housing at a time of low-speed revolution of the engine such as idling operation. There is further provided a partition wall integrally with an inside portion of the drive-shaft housing so as to divide the inside thereof into an expansion chamber communicated with the exhaust gas passage and a release chamber communicated with the exhaust release passage, and the partition wall has a cutout portion at an upper end portion thereof, through which the expansion chamber and the release chamber are communicated with each other.

Outboard motor

An outboard motor air intake device having a throttle body is located essentially horizontally in front of the engine, and includes a surge tank located on a side part of the throttle body, and an air intake manifold with multiple air intake pipes which extend on one side of the engine from the surge tank to each of the cylinders. A throttle valve is located in the throttle body and the linkage mechanism that operates this throttle valve is located opposite to the engine's air intake manifold, so that the linkage is easy to assemble and maintain.

Growing community of inventors

Shizuoka-Ken, Japan

Yoshiaki Yuda