Yanmar 4JH4E - Starting Trouble

3. Troubleshooting
109
(I) Pinion gears do not mesh
(II) Ring gears do not mesh
(III) Fuel oil not injected
No. Cause and effect Countermeasure
1 Loose battery engage magnet terminal. Tighten.
2 Faulty connection in starting switch. Repair using sandpaper or replace.
3 Cut battery engage magnet coil. Replace.
4 Rough cap movement. Repair using sandpaper and then grease.
5 Edges of gear teeth misshapen. Adjust.
6 Faulty positioning of pinion and ring gears. Adjust.
7 Seizure of starter metal. Replace.
No. Cause and effect Countermeasure
1 Loose battery starter terminal. Tighten.
2 Faulty connection in engage magnet switch. Repair using sandpaper.
3 Worn brushes. Replace.
4 Commutator rough and dirty. Repair using sandpaper (Type 500∼600).
5 Cut starter coil. Replace.
6 Worn commutator. Undercut and repair or replace.
7 Slippage of starter clutch. Replace.
8 Excessive resistance between battery and starter. Replace with thicker or shorter wire.
9 Insufficient battery charge. Charge.
No. Cause and effect Countermeasure
1 Imperfect priming of fuel oil system. Prime well.
2 Injection cut off due to faulty governor. Adjust.
3 Clogging of fuel inlet filter. Clean out matter causing clogging.
4 Insufficient fuel oil in tank. Add fuel to fuel tank.
5 Fuel oil tank cock closed. Open cock.
6 Clogging in fuel oil pipe. Clean.
7 Damaged fuel oil supply pump. Disassemble and repair or replace.
8 Water in fuel oil tank. Drain water from fuel system and prime.
STARTING TROUBLE
(I) Pinion gears
do not mesh
(III) Fuel oil not
injected
(IV) Faulty fuel injection
valve
(II) Ring gears do
not mesh
(V) Faulty fuel injection
pump
(VII) Leakage of
pressurized air
(VIII) Miscellaneous(VI) Faulty fuel injection
system