Hartford Industrial Co., Ltd.
NO
CG
3.Reason a breakdown
Page
3-3
3.3 Idle or slow running poor
Start engine
Check
Possible cause
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
Check ignition
timing
Check carburetor
adjustment
Check for air leak
at intake manifold
Remove spark plug,
ground body and check
for spark when cranking
engine
Ignition timing correct
Ignition timing
incorrect
Correct
Incorrect
No air leak
Air leaking
Spark at plug
Poor or no spark at
plug