Yanmar YSE8 - General Description; Contruction

3.
GENERAL
DESCRIPTION
Each
of Yanmar diesel engines, models YSE8
and YSE12,
comes equipped
with
clutch reduction
gear,
which togethei with a flywheel
is totally enclosed
in the flywheel
housing and the clutch housing. The
propeller
shaft is run from
the flywheel
side.
The starter for electrical
starting is directly mounted
to the fly\rheel
housing
to
drive
the ring
gear
of the nyl,heel For chain starting,
the
power
take-olf
shaft is
chain-connected to the starting
shaft located immediately above the
cjlinder. The
engine
is
started
b]'clockwise
rotation on
the stern
side and by counter-clockwise
rotation
on the
bo'i{ side.
3,1
Construction
{
Part
Description
& Specifications
1.
CrI.
bodr llonoblock
casting
of water
jacket,
crankcase
and
oil
pan.
2.
Cyl,
liner Wet tlpe made
of special cast
iron and
coated with
special anticorrosive
paint.
3.
Main
bearing
4. Cyl.
Side cover side:
precision
kelmet
metal
with
thin
back metal.
Fl]'wheel side:
Thick meta-I.
Gasket
tfpe,
part
of
monoblock
including
valve
guides.
5.
Intake/exhaust
valve
Mushroom ttpe.
6.
Intake
pipe
lntak€
enenia type
mad€ of st€el.
7. Exhaust
silencer
Round,
expansion
t!pe,
or water injection type'
8. Valve
drive system Tappet &
valve
push
rod
type. Parabolic
suction/
exhaust cam with
approach ramp.
9. C
rankshaft
Stamp forged, with
induction hardened
journal, pin
and
oil
seal
portions,
10. Flywheel
Mounted to clutch,
enclosed
in flywheel housing-
11. Piston
Made of aluminum
alloj/,
oval shaped.
12.
Piston rings Three
compression
rings,
one oil scraper
ring.
13.
Piston
pin
Float
type.
\
3