Yanmar 4LHA-HTP Operation Manual page 430

Chapter 3 Fuel Injection Equipment
1. Fuel Supply System
(3) Torque rise equipment
This governor can be equipped with an angleich spring for
torque rise.
It is therefore suitable for use with various engines.
Cam speed: Nc (rpm)
(4) Smoke cut device
(4H1) Angleich spring
Rated output
rack position
3-2-8
This governor can be equipped with the smoke cut spring
(angleich spring) which reduces injection at low-and
middle speed ranges.
The smoke cut spring decreases fuel injection to minimize
black smoke, which would otherwise occur just after the
engine is started or an idling engine is started rapidly, (the
speed control lever is turned to "FULL"), as for a marine
engine.
Tension lever
Angleich spring
(Smoke cut spring)
Fuel decreasing stroke
for smoke cut
. I
c
o
'S a
Cam speed (rpm)
4LHA Series
A ^ ' ^ k e ^ t l
p
R a t e d o u t U t
« rack p o s i t i o n