Difficult Start-Up - Yanmar YSE8 Service Manual

Check poi[t Possible cause Remecty
?. Fuel injection
nozzle
1. Stuck or worn nozzle.
Clean or renev.
I 9
2, Hight or low injection pres-
sure.
Adjust to 160 kglcm2.
20
8. Main bearing
1. Stuck or seized.
C l e a n o r r e n e r r .
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. )
a t 2 0 ' 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. )
a t 2 0 ' C .
2. Voltage drop (under no load)
Renew ii below 12V.
12. Govelllor lever
1. Not properly adjusted.
Readjust. 3 8
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. 1 9
2. Low injection pressure.
Ad.iust to 160 kg,/cmz. 2 0
3. Worn plunger.
R e n e w .
4. Intak€/exhaust
1. Misadjusted.
Reactjust.
3 9
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,
3 3
3. Stuck or seized crankpin
metal.
Correct or renew.
2 6
4.
Unsuitable lube oil.
Change oil
8
l t
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