Kubota DF972-E2, Workshop Manual, Page: 71 / 138

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
KiSC issued 01, 2006 A