Patent ID: 9656734
Date: 2017-05-23
CPC Classifications: B63H,F01M,F16N

Claim:
1. An outboard motor comprising: a prime mover; a driveshaft extending in an up/down direction below the prime mover and to which a rotation of the prime mover is transmitted; a gear mechanism coupled to a lower end portion of the driveshaft and to which a rotation of the driveshaft is transmitted; a propeller shaft to which a rotation of the gear mechanism is transmitted; a lower case in which the driveshaft is inserted and defining a gear chamber that houses the gear mechanism and a lubricating oil; an upper bearing positioned above the gear mechanism and rotatably supporting the driveshaft inside the lower case; a feed passage through which the lubricating oil that is made to flow upward from the gear mechanism by rotation of the gear mechanism is fed upward from the gear chamber; a return passage separate from the feed passage and returning the lubricating oil, fed by the feed passage, to the gear chamber; and a connection passage guiding the lubricating oil from the feed passage to the return passage; wherein the feed passage includes: