Oil separator for engine, and personal watercraft

A personal watercraft comprising:

• a body formed by a hull and a deck;
• an engine body mounted in the body;
• an air-intake system configured to draw air taken in from outside into the engine body;
• and
• an oil separator configured to separate a blow-by gas discharged from the engine body into a gas and a liquid, the oil separator including:
• a tubular oil chamber provided with its center axis extending substantially in a vertical direction, the oil chamber having closed upper and lower opening ends;
• an air-fuel mixture transport pipe connected to a peripheral portion of the oil chamber so as to communicate with an inner space thereof, the air-fuel mixture transport pipe being configured to transport the blow-by gas from the engine body into the oil chamber;
• a blow-by gas discharge pipe connected to an upper end portion of the oil chamber so as to communicate with the inner space thereof, to allow the blow-by gas to be discharged from the oil chamber through the blow-by gas discharge pipe;
• and
• an oil discharge pipe connected to a lower end portion of the oil chamber so as to communicate with the inner space thereof, to allow the oil to be discharged from the oil chamber through the oil discharge pipe, wherein
• a connecting end portion of the blow-by gas discharge pipe opens downwardly within the oil chamber, and a connecting end portion of the air-fuel mixture transport pipe is placed in the vicinity of an inner peripheral face of the oil chamber so as to open in a circumferential direction of the oil chamber, wherein
• at least part of the air-intake system is located on a first side of right and left sides of the body with respect to the engine body, the oil chamber of the oil separator is placed on a second side of the right and left sides with respect to the engine body, and the blow-by gas discharge pipe extends from the oil chamber to the part of the air-intake system located on the first side with respect to the engine body.