Honda Motor Co., Ltd.

Ryo Ogasawara

Hajime Yoshimura

Nobuchika Katagiri

Hiroshi Yamamoto

A dog clutch mechanism incorporated in an outboard motor includes a sliding clutch dog member splined to a propeller shaft and having recesses on each end face thereof, and a row of gear teeth formed on an end face of each of a pair of driven gears rotatably mounted on the propeller shaft. Each of the recesses has a bottom surface stepped to provide a corner edge at a stepped portion thereof. Each of the gear teeth has a beveled surface formed at a rear edge as viewed from a rotating direction of the driven gear. When the gear teeth are in mesh with the recesses of the clutch dog member, the corner edge of the stepped bottom surface of each recess is in contact with the beveled surface of the mating gear tooth.

Dog clutch mechanism for outboard motor

Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface.

Outboard engine unit

A clutch detent mechanism for an outboard motor includes a ball movable with a clutch dog member, a ball retainer member provided in a propeller shaft for retaining the ball in a predetermined position, and a compression coil spring acting on the ball to resiliently force the ball against the ball retainer member. The ball retainer member has a recessed portion for receiving therein the ball to thereby retain the clutch dog member in a neutral position, a front tapered portion provided on one side of the recessed portion for retaining the ball in a position to keep the clutch dog member in a forward shift position, and a rear tapered portion provided on the other side of the recessed portion for retaining the ball in a position to keep the clutch dog member in a reverse shift position.

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Wako, Japan

Ryo Ogasawara