Yanmar YSE8 - Yanmar YSE Troubleshooting: Difficult Start-up

Check
poi[t
Possible cause
Remecty
?.
Fuel
injection
nozzle
1.
Stuck
or worn nozzle.
Clean
or renev.
I9
2,
Hight
or low injection
pres-
sure.
Adjust to
160 kglcm2.
20
8. Main bearing
1. Stuck
or seized. Clean
or renerr.
9. Crankpin
metal 1. Stuck
or
seized.
Clean
or rene*.
26
10. Starter operatio.r
1.
Battery
discharge. Recharge
up to
1,26
(S.
C.
)
at
20'C.
2, Kev switch fault. Renew.
3, Magnet switch fault.
Correct
or renew.
.1,
llotor brush
fault.
5.
llotor unit fault.
Renew.
Renew,
11. Batterv
I. Batter! discharge, Recharge
up to 1.
26 (S.
G.
)
at
20'C.
2.
Voltage
drop (under no load) Renew
ii below
12V.
12. Govelllor
lever 1. Not
properly
adjusted. Readjust.
38
F.
.l
t
=.
I
Dilficult
Start.up
4
Check
point
Possible cause
Remedy
l. Temperature 1. Lo\a
. Select
suitable
lube oiL
Use
start-up
accelerator.
2. Fuel oil
l.
Unsuitable
qualit!.
Change
fuel
oil 7
3. Injection
1, Stuck
or worn
nozzle
valve. Clean
or renew. 19
2. Low injection
pressure.
Ad.iust
to 160
kg,/cmz. 20
3. Worn
plunger.
Renew.
4. Intak€/exhaust 1. Misadjusted.
Reactjust.
39
5,
Compression
6.
Electric
equrpment
7. Heavy manual
turnrng
1. Stuck or seized
piston,
liner. Correct
or renew.
26
3t)
2, Stuck
or seized main beadng
metal.
Correct
oI renew,
33
3. Stuck
or seized crankpin
metal.
Correct
or
renew.
26
4. Unsuitable
lube
oil.
Change
oil
8
lt
: