Patent ID: 6886514

Claim:
An engine of a personal watercraft, comprising: a cylinder head; a cylinder head cover provided over the cylinder head; an ignition plug attached to the cylinder head; a penetrating hole formed to extend from an upper surface of the cylinder head cover to a lower surface of the cylinder head through the cylinder head cover and the cylinder head, for accommodating and attaching the ignition plug inside thereof, the penetrating hole including a step portion axially supporting the ignition plug, and a screw portion extending downwardly from the step portion to open in the lower surface of the cylinder head, for fixing the ignition plug; a connecting member connected to an upper end of the ignition plug and located inside the penetrating hole, for connecting a power supply that activates the ignition plug to the ignition plug; a closing member for creating a seal between the connecting member and the penetrating hole; and an air hole formed to extend obliquely downward from a vicinity of the step portion so as to communicate with an outside of the cylinder head.