Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 41Get this manual
Trigger Coil
Flywheel Assembly
aTrigger Coil
A single wound coil with magnet core mounted to one side of the stator mounting baseThe trigger is positioned on the outside of the flywheel assembly and is charged when raised boss on the flywheel passes the triggermagnet windingA pulse voltage is then sent to an (SCR) switch within the CDI unitThe trigger is mounted in fixed timing positionaPermanent MagnetRaised Boss (trigger actuation point)Flywheel
Stator Assembly
The flywheel assembly contains one permanently charged magnet which is bonded and retained to the inner wall of the flywheelThis magnet is segmented with positive and negative poles(6 pole) (3 positive pulses per revolution)a