Lincoln Electric IM529 CLASSIC III D - Manual (Page 25)

E-5 TROUBLESHOOTING
CLASSIC III AND IIID
E-5
ENGINE TROUBLESHOOTING - (TM27 Gasoline Engine Only)
TROUBLE CAUSES WHAT TO DO
7. Large decrease in speed. a. Misadjusted governor spring adjusting screw. a. Adjust screw until speed does not drop more than
100 rpm ± 25 rpm when arc is struck. If surge
occurs, eliminate it with the control rod. If high
idle speed changes, readjust the high idle
speed screw. **
8. Unable to strike an arc. a. Idle speed screw is misadjusted. a. Idle speed is set too low so idler fails to operate
when arc is struck. Adjust low idle speed
screw for 1350 ± 25 rpm.
9. Engine runs irregularly. a. Carburetor set too lean. a. Adjust carburetor adjusting screw so engine will
run smoothly at idle speed. **
b. Carburetor Deicing Kit in wrong configuration. b. Carburetor Deicing Kit per instructions on page B3
and B4
.
10. Engine fails to pick up speed a. Check the idler.
when arc is struck.
**
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