Engine cylinder head coolant jacket

摘要

A multiple cylinder engine for a small watercraft is provided with a separately structured cylinder head and cylinder head cover which cooperate when fastened together to define a cylinder head water jacket with chambers for cooling each cylinder in the engine. A longitudinally oriented coolant passage runs past and communicates with each water jacket chamber to facilitate flow of cooling water out of each chamber. In an embodiment in which the cylinders are inclined, the coolant passage is positioned in a higher location than the water jacket chambers.