Yanmar 4LHA-HTP Operation Manual page 385

Chapter 3 Fuel Injection Equipment
6. Governing Mechanism
Fig. 32 Combination governor operation: no-load maximum speed control
To prevent the engine from exceeding the spe-
cified maximum speed when pump speed in-
creases further, due to variations in load etc,
the flyweights begin to compress the governor
spring and the tension lever is pivotted clock-
Flyweight
s:
Control sleeve
Governor spring
tr
IL
Partial load spring
wise around point M2 to move the control
sleeve in the non-injection direction.
The governor therefore controls the engine
speed so that it does not exceed the engine's
specified maximum speed.
3-1-28
Tension lever
Cut-off port
Tension lever
i 4LHA Series