Yanmar 4LHA-HTP Operation Manual page 376

Chapter 3 Fuel Injection Equipment
6. Governing Mechanism
Idling operation
Idling adjusting screw
Flyweight
Fig. 21 Variable speed governor operation: idling operation
Once the engine has started the accelerator
pedal is returned to its original position. The
control lever is also returned to its original posi-
tion and the governor spring tension becomes
" 0 " . The flyweights then open, the starting le-
ver is pressed against the tension lever and
compression of the idling' spring begins.
Governor spring
)
. 1 . 1
S :
i
Governor sleeve
Starting lever
IVh (fulcrum)
Control sleeve
3-1-19
Idling spring
Tension lever
Control lever
The control sleeve then travels in the fuel-
decrease direction and stops in the position
where the flyweights' centrifugal force and the
idling spring force are balanced. In this position
stable idling operation can be obtained.
4LHA Seru