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CHAPTER 6 IGNITION
GENERAL INFORMATION
All TC/TM engines are equipped with a solid state ignition module mounted outside the flywheel. The solid state ignition
system consists of a flywheel magnet, charge coil, capacitor, a silicon controlled rectifier, a pulse transformer, trigger
coil, high tension lead, and a spark plug. Some TC Type II modules also contain an ignition rev limiting device to prevent
the engine from exceeding the maximum rpm. This type of limiter is used on mini-carts for safety reasons. All
components except the spark plug and high tension lead are located in an encapsulated ignition module. The module
is protected by epoxy filler from exposure to dirt and moisture. This system requires no maintenance other than checks
of the high tension lead and spark plug.
1. FLYWHEEL WITH MAGNETS
2. FLYWHEEL KEY
3. IGNITION MODULE
4. SPARK PLUG
5. IGNITION SWITCH
OPERATION
As the magnet in the flywheel rotates past the charge coil,
electrical energy is produced in the module. The energy is
stored in the capacitor (approx. 200 volts) until it is
released by an electrical switch (SCR). As the magnet
continues to rotate, it passes past a trigger coil where a
low voltage signal is produced. This low voltage signal
closes the SCR switch, allowing the energy stored in the
capacitor to flow to a transformer where the voltage is
increased from 200 volts to 25,000 volts. This voltage
flows along the high tension lead to the spark plug where
it arcs across the electrodes and ignites the air-fuel
mixture (diag. 6-1).
COMPONENTS
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6-2
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