Outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsHiroki Koga, Yoshiyuki Kadobayashi, Akihiro Noma, Kimitaka Saruwatari, Junya Onoue
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Abstract
An outboard motor includes an engine, an upper case, a lower case, a cavitation plate, a transmission, a cooling water passage, a first pump, and a second pump. The transmission includes a drive shaft and a propeller shaft. The cooling water passage is connected to the engine and located in the upper case and the lower case. The first pump is above the cavitation plate. The first pump is connected to the drive shaft and operable to send cooling water to the engine through the cooling water passage. The second pump is drivable by the driving force from the transmission to send the cooling water to the engine through the cooling water passage.
Claims18
An outboard motor comprising:
- an engine;
- an upper case below the engine;
- a lower case below the upper case;
- a cavitation plate connected to the lower case;
- a transmission including:
- a drive shaft extending downward from the engine and located in the upper case and the lower case;
- and
- a propeller shaft connected to the drive shaft, extending in a front-rear direction of the outboard motor, and located in the lower case;
- a cooling water passage connected to the engine and located in the upper case and the lower case;
- a first pump at least partially above the cavitation plate, connected to the drive shaft, drivable by a driving force from the drive shaft, and operable to send cooling water to the engine through the cooling water passage;
- and
- a second pump drivable by a driving force from the transmission to send the cooling water to the engine through the cooling water passage.
Dependencies are inferred from the claim text.