Linhai ARCHON 400 Service Manual page 190

CHAPTER 8 ELECTRICAL
8.3 IGNITION SYSTEM
IGNITION SYSTEM TROUBLESHOOTING
No Spark, Weak or Intermittent Spark
 Spark plug gap incorrect
 Fouled spark plug
 Faulty spark plug cap or poor connection to high tension lead
 Related wiring loose, disconnected, shorted, or corroded
Engine stop switch or ignition switch faulty
 Terminal board or connections wet, corroded
 Poor ignition coil ground (e.g. coil mount loose or corroded)
 Faulty stator (measure resistance of all ignition related windings)
Incorrect wiring (inspect color coding in connectors etc. )
 Faulty ignition coil winding (measure resistance of primary and secondary)
 Worn magneto (RH) end crankshaft bearings
 Sheared flywheel key
 Flywheel loose or damaged
 Trigger coil air gap too wide (where applicable) should be 0.030-0 .050" (0. 75-1.25 mm)
 Excessive crankshaft run out on magneto (RH) end should not exceed 0.005"
(0.13mm)
 Faulty ECU(EFI)
CIRCUIT DIAGRAM
BUCK 450 SERVICE MANUAL 20.0
CHAPTER 8 ELECTRICAL PAGE.8- 6