Engine Turns Over But Fails to Start
G No fuel
G Dirt in fuel line or filter
G Fuel will not pass through fuel valve
G Tank vent plugged or pinched
G Carb starter circuit plugged
G Engine flooded
G Low compression (high cylinder
leakage)
G No spark (Spark plug fouled)
ignition component failure
G Safety switches malfunctioning
(Ignition, Kill, Brake--to--start)
G Electrical malfunction
Engine Does Not Turn Over
G Dead battery
G Starter motor does not turn
G Engine seized, rusted, or
mechanical failure
G Safety switches malfunctioning
(Ignition, Kill, Brake--to--start)
IGNITION SYSTEM
TROUBLESHOOTING
No Spark, Weak or Intermittent Spark
G Spark plug gap incorrect
G Fouled spark plug
G Faulty spark plug cap or poor
connection to high tension lead
G Related wiring loose, disconnected,
shorted, or corroded
G Engine Stop switch or ignition switch
faulty
G ETC switch misadjusted or faulty
G Poor ignition coil ground (e.g. coil
mount loose or corroded)
G Faulty stator (measure resistance of
all ignition related windings)
G Incorrect wiring (inspect color coding
in connectors etc)
G Faulty ignition coil winding (measure
resistance of primary and secondary)
G Worn magneto (RH) end Crankshaft
bearings
G Sheared flywheel key
G Flywheel loose or damaged
G Excessive crankshaft runout on
magneto (RH) end should not exceed
.005
G Faulty CDI module
G Ground circuits are corroded or
broken
