Yanmar 4LHA-HTP Operation Manual page 432

Chapter 3 Fuel Injection Equipment
1. Fuel Supply System
(4H2W3) Operation of cancel knob
1 Since the boost compensator is the device that limits the
fuel injection amount for starting the engine in cold tem-
peratures (below -5°C), it is necessary to cancel the func-
tion of the boost compensator and increase the fuel injec-
tion amount.
I If the engine is gard to start in cold temperatures, start the
engine by pulling the c a n c e l knob (cold start knob).
3 Once the engine is started, push the knob back into re-
sume the function of the boost compensator.
4M2M4) Adjustment of boost compensator
The initial rack of the boost compensator has been ad-
justed properly at the time of shipment. However, the ac-
celeration can be increased at the request of the cus-
tomer. Watch the color of the exhaust while making the
adjustment.
Adjust bolt
Procedure>
iemove the cap nut of adjust bolt with the blade-type screw
river.
Large effect on
Right turn
boost comp.
Small effect on
Left tum
boost comp.
• Higher acceleration
• More black exhaust
• Lower acceleration
• Less black exhaust
3-2-10
4LHA Series