Four stroke engine having flexible arrangement

A personal watercraft for use by at least one passenger, comprising:

• a hull;
• a seating assembly for the at least one passenger;
• and
• a four stroke internal combustion engine located within the hull, wherein the engine comprises
• a crankcase secured to the hull, wherein the crankcase has a crankshaft rotatably mounted therein, wherein the crankshaft extends from one end of the crankcase;
• a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one cylinder;
• at least one intake valve for the at least one cylinder;
• at least one exhaust valve for the of the at least one cylinder;
• a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
• at least one intake passageway operatively connected to the at least one cylinder;
• an air intake manifold having a central air passageway extending between a first end and a second end and at least one passageway extending from the central air passageway to a free end, wherein the free end of the at least one passageway is adapted to be connected to the at least one air intake passageway;
• a cam shaft located in the cylinder head and operatively connected to the valve actuation assembly;
• and
• a power take off housing located on the one end of the crankcase,
• wherein the crankshaft is operatively connected to the cam shaft within the power take off housing, and
• wherein the crankshaft is operatively coupled within the power take off housing to a drive shaft, and at least one of a generator, an engine starting mechanism, a balance shaft, and a supercharger.