Yamaha Hatsudoki Kabushiki Kaisha

Kureha Elastomer Co., Ltd.

Ryuji Uchiyama

Makoto Mizutani

Nobuyuki Mouri

Toshiaki Doi

Mitsuru Kitamura

Tomohiko Takajyou

A watercraft can have an electric motor mounted on a screw bar extending in a right/left direction. The electric motor can move along the screw bar in the right/left direction to steer an outboard motor, or another part of a different marine propulsion system. One or more springs can be provided at the ends of the screw bar. When the outboard motor whose steered angle exists in a predetermined angle range including the maximum steered angle is steered back to a neutral position, either one of the springs presses the electric motor toward the center of the screw bar to assist the steering torque of the electric motor.

Growing community of inventors

Shizuoka, Japan

Ryuji Uchiyama