Engine troubleshooting, Troubleshooting, Caution – Lincoln Electric IM529 CLASSIC III D User Manual
Page 24: Classic iii and iiid
E-4
TROUBLESHOOTING
CLASSIC III AND IIID
E-4
ENGINE TROUBLESHOOTING -
(TM27 Gasoline Engine Only)
TROUBLE
CAUSES
WHAT TO DO
1.
Engine fails to start
a.
Out of fuel.
a.
Fill with gasoline.
b.
Clogged fuel system.
b.
Check all lines to the carburetor.
c.
Choke not closing tightly.
c.
Loosen choke cable screw and slack off choke wire.
d.
Ignition switch shorted or open.
d.
Replace.
e.
Moisture or carbon on spark plugs.
e.
Remove plugs, clean and adjust gap.
(See Engine Service Chart)
f.
Defective distributor.
f.
Replace.
2.
Low oil pressure. Light not lit
a.
Oil too light.
a.
Drain; refill with proper grade.
when engine is running.
b.
Oil too low.
b.
Fill to “Full” mark on bayonet gage. Do not overfill.
c.
Defective oil pressure switch or light.
c.
Replace.
3.
Lack of power.
a.
Carbon deposits causing pre-ignition.
a.
Run engine under full load for a short time.
b.
Incorrect timing.
b.
Time ignition. **
4.
Overheating.
a.
No water in radiator or clogged cooling system.
a.
Check throughout for dirty or broken hoses, clogged
radiator, or defective water pump.
b.
Late timing.
b.
Time ignition. **
c.
Improper valve clearance.
c.
Adjust valve tappets. (See Engine Service Chart
for settings).
d.
Fan belt too loose.
d.
Adjust for 3/4” to 1” deflection.
5.
Knocking.
a.
Poor grade of gasoline.
a.
Use at least 87 octane gasoline.
b.
Spark advanced too far.
b.
Retime ignition. **
6.
Surging.
a.
Governor and carburetor toggles and butterfly
a.
Clean and lubricate. Replace toggles if worn.
valve shaft lever are dirty and sticking.
b.
Dirty air filter.
b.
Remove and clean according to instructions on unit.
c.
Governor spring adjusting screw misadjusted.
c.
Adjust screw enough to eliminate surge. **
d.
Governor control rod wrong length.
d.
Adjust length of control rod so that there is from
1/32” to 1/16” clearance between the stop pin
and the stop when the engine is shut off and the
regulator expanded. **
**
See engine manual.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION