Patent ID: 6988919

Claim:
An oil cooler of an engine for a small watercraft, comprising: a first cooling portion including a passage forming plate provided with grooves respectively formed on one face thereof and an opposite face thereof, a first cover member and a second cover member stacked on the passage forming plate and configured to respectively cover the grooves, an oil passage formed by covering the groove formed on the one face of the passage forming plate with the first cover member, and a coolant passage formed by covering the groove formed on the opposite face of the passage forming plate with the second cover member; a mounting bolt by which the first cooling portion is removably mountable on an outer wall face of the engine; and an oil filter mounted on an outer wall face of the first cover member; wherein the first cover member is provided with a first oil hole through which the oil passage of the first cooling portion and the oil filter communicate with each other, and the second cover member is provided with a second oil hole through which the oil passage of the first cooling portion and an oil passage formed within the engine communicate with each other.