Idle Or Show Running Poor - HARTFORD CG-125 Service Manual

3.Reason a breakdown
3.3 Idle or slow running poor
Check
Check ignition
timing
Ignition timing correct
Check carburetor
adjustment
Check for air leak
at intake manifold
Remove spark plug,
ground body and check
for spark when cranking
engine
Spark at plug
Start engine
Hartford Industrial Co., Ltd.
Possible cause
Correct
No air leak
Poor or no spark at
plug
Ignition timing
incorrect
Incorrect
Air leaking
NO CG
3-3
Page
Possible reason
1.CDI or AC generator faulty
2.Valve clearance incorrect
1.Choke not returning to
closed position
2.Fuel mixture too rich
(loosen idle mixture screw)
3.Fuel mixture too weak
(tighten idle mixture screw)
1.Insulator gaskets damaged
or leaking
2.Carburetor mounting nuts
loose
3.Intake manifold gaskets
damaged or leaking
4.Carburetor flange seal
damaged or leaking
1.Spark plug fouled or worn
2.CDI faulty
3.AC generator faulty
4.Ignition coil open circuit or
faulty
5.HT lead or spark plug cap
short circuit or faulty