Patent ID: 7645175

Claim:
An engine for a watercraft having a hull, the engine including an oil supplying apparatus for supplying lubricating oil to moving components of the engine, the oil supplying apparatus comprising: an oil sump configured to collect oil from the moving components of the engine after the oil has been used to lubricate the moving components of the engine; a vapor-liquid separation chamber for separating from the oil, air and blow-by gases included in the oil; a first oil pump connected to the oil sump and the vapor-liquid separator chamber and configured to pump oil reserved in the oil sump to the vapor-liquid separation chamber; an oil return path defining a passage arranged to return oil, from which air and blow-by gas were separated in the vapor-liquid separation chamber, to the oil sump; and a second oil pump connected to the oil sump and to at least one lubrication passage in the engine and configured to pump oil reserved in the oil sump to the lubrication passage in the engine; wherein the vapor-liquid separation chamber is not connected to the second oil pump in series.