ENGINE
WG972-E4, WSM
1-S1
1. TROUBLESHOOTING
[1] FOR GENERAL
Symptom
Probable Cause and
Checking Procedure
Solution
Reference
Page
Engine Does Not Turn
Over
1. Seizure of crankshaft,
piston, etc.
Check if crankshaft rotates –
Repair or replace 1-S33,
1-S36
2. Battery discharged Charge –
3. Wire disconnection or
damaged
Check the wire harness –
Reconnect or replace –
4. Starter malfunctioning Repair or replace 1-S22,
1-S23,
1-S58
Engine Turns Over
Slowly But Does Not
Start
1. Increased resistance of
moving parts
Repair or replace –
2. Excessively high viscosity
engine oil at low
temperature
Use specified engine oil G-15
Engine Turns Over At
Normal Speed But
Does Not Start
1. Fuel does not flow Check the fuel tank, fuel filter, fuel hoses
and fuel pump
–
Repair or replace G-15
2. Fuel filter clogged Check and replace G-16, G-17
3. Damaged spark plug Check and adjust or replace 1-S20,
1-S21
4. Damaged ignition coil Check and replace 1-S21
5. Wires disconnection or
damaged
Check the wire harness –
Reconnect or replace –
6. Bad connection of ignition
coil and spark plug
Reconnect –
7. Clogged air cleaner Clean or replace G-14, G-24
8. Improper valve clearance Check the compression pressure 1-S14
Adjust 1-S15
9. Improper intake and
exhaust valve sealing
Check the compression pressure 1-S14
Check and replace 1-S42
10.Excessive wear of rings
and liners
Check the compression pressure 1-S14
Check and replace 1-S50,
1-S56
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