Question about Sport & Outdoor - Others
Servicing Transistor-Controlled Ignitions
A transistor-controlled ignition (TCI) uses transistors, resistors, and diodes to control the timing of the spark to the engine. Because it has no moving parts, it too is called a breakerless or solid-state ignition. Most TCIs require no service. However, to ensure long-term performance, perform the following inspection on a regular basis.
The TCI controls a voltage of up to 30,000 volts for delivery to the spark plug. Be extremely careful when working around the TCI, as you can injure yourself or the ignition system with high voltage. Use the following steps to service a transistor-controlled ignition unit:
Step 1: Remove the lead from the spark plug to prevent starting. Ground the spark plug lead by attaching it to the shroud.
Step 2: Check the TCI unit to make sure it has not been damaged. Sensitive electronic components are mounted on a printed circuit board within the box and can be damaged by force or by excessive heat.
Step 3: Check all leads to and from the TCI unit to make sure they are tightly connected and that insulation is not cut or frayed.
Step 4: Visually inspect the magnet and ignition coil mounted next to the flywheel. Look for damage to the end of the magnet or the edge of the flywheel.
Posted on Aug 24, 2010
Hi, we're going to need more information to help you. Can you describe the type of unit you're referring to, make, and model number, in addition to the part number? I couldn't run down anything except transmissions searching for "TCI". I will await your reply, thanks.
Posted on Aug 24, 2010
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