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Tech-Note 1: Mark-3 Electronic Ignition
A more efficient and maintenance free electronic ignition system
Since the introduction of the MK-3 fire pump into the industry, the MK-3 utilized breaker points in its ignition system, which inherently required maintenance; i.e. the gap adjustment, points cleaned and/or completely changed.
The upgrade to the electronic ignition system will eliminate the need for regular maintenance associated with breaker points. The electronic ignition system uses a magnetic pickup located on the flywheel, which when passing over a certain point on the stator will induce a high voltage, therefore causing the spark plug to fire at the proper moment.
The electronic ignition module is equipped with spark advance, thus allowing for a cleaner burn at a higher RPM. During testing it was found that the engine ran smoother and was much more responsive. When the engine is started cold, it runs rough (as if the timing were off) for about 15-30 seconds, after which the engine runs smooth.
In order to convert a MK-3 from breaker points to the upgraded electronic ignition system, the following retrofit kit was created:
B-7595 : Mark-3 Conversion kit, point to CDI
The ignition cable is larger in diameter than the previous one used on the MK-3 with breaker points.
The breakdown of the electronic ignition is depicted in the picture a the bottom. The electronic module is placed in an aluminium box located on the frame below the carburetor shroud.
1: Stator
2: Flywheel
3: Magneto Flywheel Assembly
16: Electronic Box
17: Protection Cap
18: Ignition Cable
19: Spark Plug Connector
20: Spark Plug
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