Starting Trouble - Yanmar 3JH4E Service Manual

(I) Pinion gears
do not mesh
(V) Faulty fuel injection
pump
(I) Pinion gears do not mesh
No.
1 Loose battery engage magnet terminal.
2 Faulty connection in starting switch.
3 Cut battery engage magnet coil.
4 Rough cap movement.
5 Edges of gear teeth misshapen.
6 Faulty positioning of pinion and ring gears.
7 Seizure of starter metal.
(II) Ring gears do not mesh
No.
1 Loose battery starter terminal.
2 Faulty connection in engage magnet switch.
3 Worn brushes.
4 Commutator rough and dirty.
5 Cut starter coil.
6 Worn commutator.
7 Slippage of starter clutch.
8 Excessive resistance between battery and starter. Replace with thicker or shorter wire.
9 Insufficient battery charge.
(III) Fuel oil not injected
No.
1 Imperfect priming of fuel oil system.
2 Injection cut off due to faulty governor.
3 Clogging of fuel inlet filter.
4 Insufficient fuel oil in tank.
5 Fuel oil tank cock closed.
6 Clogging in fuel oil pipe.
7 Damaged fuel oil supply pump.
8 Water in fuel oil tank.

STARTING TROUBLE

(II) Ring gears do
not mesh
(VI) Faulty fuel injection
system
Cause and effect
Cause and effect
Cause and effect
(III) Fuel oil not (IV) Faulty fuel injection
injected
(VII) Leakage of
pressurized air
Countermeasure
Tighten.
Repair using sandpaper or replace.
Replace.
Repair using sandpaper and then grease.
Adjust.
Adjust.
Replace.
Countermeasure
Tighten.
Repair using sandpaper.
Replace.
Repair using sandpaper (Type 500∼600).
Replace.
Undercut and repair or replace.
Replace.
Charge.
Countermeasure
Prime well.
Adjust.
Clean out matter causing clogging.
Add fuel to fuel tank.
Open cock.
Clean.
Disassemble and repair or replace.
Drain water from fuel system and prime.
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3. Troubleshooting
valve
(VIII) Miscellaneous