S-1
WG972-E2, DF972-E2, WSM
GASOLINE / LPG ENGINE
1. TROUBLESHOOTING
[1] FOR GASOLINE FUEL
W1014322
Symptom Probable Cause Solution
Reference
Page
Engine Will Not Turn
Over
Engine jammed Check engine to find
the problem and
repair it
–
Battery discharged Charge –
Starter malfunctioning Repair or replace S-27
Wires disconnected Reconnect –
Engine Turns Over
Slowly but Does Not
Start
Increased resistance of moving parts Repair or replace –
Excessively high viscosity engine oil at low
temperature
Use specified engine
oil
G-8
Engine Turns Over at
Normal Speed but
Does Not Start
No fuel Replenish fuel –
Compression leak Check the
compression
pressure and repair
S-14
Improper valve clearance Adjust S-16
Defective ignition coil Replace S-25
Defective spark plug Adjust spark plug gap
or replace
G-10
Defective ignitor Replace S-26
Defective fuel system Check fuel line and
carburetor and repair
–
Over choked Clean spark plug –
Flooding from carburetor Check carburetor and
repair / replace
–
Clogged air cleaner Clean or replace G-16
Rough Low-Speed
Running and Idling
Defective ignition coil Replace S-25
Defective spark plug Adjust spark plug gap
or replace
G-10
Defective ignitor Replace G-26
Incorrect carburetor idle adjustment Adjust S-20
Incorrect governor adjustment Adjust S-20
Improper valve clearance Adjust S-16
Rough High-Speed
Running
Defective ignitor Replace S-26
Defective spark plug Adjust spark plug gap
or replace
G-10
Defective ignition coil Replace S-25
Incorrect governor adjustment Adjust S-20
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