Patent ID: 6955573

Claim:
A small watercraft comprising: a multi-cylinder engine mounted in a body of the watercraft such that an axial direction of a crankshaft corresponds with a longitudinal direction of the body; an oil tank provided such that a longitudinal direction thereof corresponds with the axial direction of the crankshaft; a first communicating port and a second communicating port formed in the oil tank at respective positions spaced apart from each other in the longitudinal direction of the oil tank; a gas-release chamber having a third communicating port and a fourth communicating port provided at respective positions spaced apart from each other, and at least one fifth communicating port located so as to communicate with an ambient side, the gas-release chamber having a bottom face located higher than a liquid level of oil inside the oil tank, wherein the first communicating port of the oil tank communicates with the third communicating port of the gas-release chamber through a first passage and the second communicating port of the oil tank communicates with the fourth communicating port of the gas-release chamber through a second passage, and each of the first and second passages is an independent conduit configured to allow the gas containing oil to flow therethrough from the oil tank to the gas-release chamber.