Patent ID: 6840829

Claim:
A jet-propulsion watercraft comprising: an engine; an oil tank provided independently of the engine, for reserving engine oil, said oil tank having an outer shell comprised of an elongated tubular body portion and end plates configured to close both ends of the body portion so as to form a closed outer space inside thereof to reserve the engine oil, and the oil tank is provided such that its longitudinal direction corresponds with a vertical direction; a water jet pump driven by the engine, the water jet pump pressurizing and accelerating water taken in from outside of the watercraft and ejecting the water from the outlet port to propel the watercraft as a reaction of the ejecting water; and a muffler of the engine, wherein the oil tank and the muffler are provided at respective locations, within an inner space of a hull of the watercraft, behind the engine and on opposite sides of the water-jet pump in a lateral direction of the watercraft such that the water-jet pump is disposed between the oil tank and the muffler.