US 12,403,995 B2
Outboard motor
Hiroki Koga, Shizuoka (JP); Yoshiyuki Kadobayashi, Shizuoka (JP); Akihiro Noma, Shizuoka (JP); Kimitaka Saruwatari, Shizuoka (JP); and Junya Onoue, Shizuoka (JP)
Assigned to YAMAHA HATSUDOKI KABUSHIKI KAISHA, Shizuoka (JP)
Filed by YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata (JP)
Filed on Nov. 2, 2022, as Appl. No. 17/979,035.
Claims priority of application No. 2022-062042 (JP), filed on Apr. 1, 2022.
Prior Publication US 2023/0312073 A1, Oct. 5, 2023
Int. Cl. B63H 20/14 (2006.01); B63H 20/02 (2006.01); B63H 20/30 (2006.01); B63H 20/32 (2006.01)
CPC B63H 20/14 (2013.01) [B63H 20/02 (2013.01); B63H 20/30 (2013.01); B63H 20/32 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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.