Service manual

4-7 CYLINDER HEAD

The cylinder head is an aluminum die-casting

which utilizes semi-spherical type combustion

chamber for the high combustion efficiency.

4-8 VALVE ARRANGEMENT

The intake valve is located on flywheel side of the

cylinder head.

The cooling fins and passages design lead cool-

ing air to the exhaust valve area for the optimum

cooling.

Hard alloy valve seats are molded in the cylinder

head and stellite is fused to the exhaust valve face.

4-9 GOVERNOR SYSTEM

The governor is a centrifugal flyweight type which

ensures constant operation at the selected speed

against load variations.

The governor gear with governor weights is in-

stalled inside of main bearing cover and driven

by the crankshaft.

Fig. 4-7

Fig. 4-8

Fig. 4-9

GOVERNOR

GEAR

INTAKE VALVE EXHAUST VALVE