Yanmar YSE8 - Troubleshooting; Yanmar YSE Troubleshooting: Engine Does Not Start

6.
TROUBLESHOOTING
The best engine
will come to malfunction i{ not
properly
handled
day
after
day or
after a
prolonged period
of service.
Locating the
trouble is the first consideration. Pinpointing
the trouble
cause is to
be done next. Then comes a
proper
remedy therefore.
If careless
handling is the
case,
the operator may be instructed not to
cause the same trouble.
The
following lists the troubles, check
points, possible
causes, and
remedies.
6.1 Engine
Does Not
Start
Check
point
Possible
cause
1.
No
valve clearance. Adjust
to 0,
2
mm.
1. Intake/€xhaust
Fit valve
with
quick
successlve movemenls.
2.
Calbod
or wear on
valve
seat.
Renew
cylinder head.
"
24
3. Worn valve
guide.
4. lntake/exhaustvalve
stuck.
Loose or uns] mmetricalll
tightened nozzle
guard.
2. Fuel injection
nozzle
2.
FaultJ
or
lost
packing.
Repair
or renew.
Change
oil.
Cylinder liner
.*
r&
piston
1.
Unsuitable Iube
oil.
2.
Gasoline
overcharged at
start-up.
3. Stuck
or
worn
piston
ring,
27
30
4. Seized or worn
piston
and
cylinder Iiner.
1.
Gasket
damaged
(loose
or
unsymmetrically ti
ghtened
head).
Renew
or retighten
4, Gasket
1.
Fuel
failure. Supply
fuel.
2. Tank cock in closed
position.
6.
Fuel injection
pump
1. Air in
pump.
Clean
or renew.
2. Difiy, scratched or worn
delivery
valve.
3. Dirty,
scratched or worn
regulator needle.
Clean
or renew.
Clean
or renew.