Engine equipped with air-intake device for personal watercraft and personal watercraft

摘要

An engine equipped with an air-intake device for a personal watercraft, includes a cylinder head cover attached to an upper surface of a cylinder head, a plug cap with ignition coil configured to protrude upward from an upper surface of the cylinder head cover; and an air box for the air-intake device that is disposed above the cylinder head cover and is provided on a lower surface thereof with an air inlet that opens to be opposite to the upper surface of the cylinder head cover. The air box is disposed in such a manner that the lower surface of the air box is opposite to the upper surface of the cylinder head cover and a gap is formed between the lower surface of the air box and the upper surface of the cylinder head cover so as to form an air flow in the vicinity of the plug cap with ignition coil that is directed to the air inlet of the air box.