Re: Trigger and stator - difference and how to test
The flywheel is fitted with permanent magnets inside the outer rim. As the flywheel rotates, the permanent magnets passs the capacitor charging coils of the stator producting AC voltage. The AC voltage is conducted to the switchbox where it is rectified and stored in a capacitor. The trigger assembly (also mounted under the flywheel) has coils. Each coil controls spark to 2 cylinders. The flywheel also has a second set of permanent magnets located around the center hub. As the flywheel rotates, the magnets pass the trigger coils producting AC voltage. The AC voltage is conducted to and electronic switch (SCR) in the switchbox. The switch discharges the capacitor voltage into the ignition coil at the correct time and in firing order sequence.
Capacitor voltage is conducted to the primary side of ignition coil. As the voltage goes to ground through the primary circuit of the coil, it induces a voltage rise in the secondary side of the ignition coil. This voltage can increase to approximately 40000 volts before bridging the spark plug gap and returning to ground.
That sequence occurs once per engine revolution for each cylinder.
Spark timing is advanced or retarded by the movement of the trigger assembly attached to the throttle/spark arm.
You now know what the trigger and stator do and what the wires on the switch box do.
I have the 3cyl, 4cyl and V-6...
