Features And Benefits; Ignition System - Yamaha F2.5A Service Manual

Features and benefits

Ignition system

A simple and compact ignition system is adopted. In this ignition system, high voltage is induced in
the secondary coil when the electric current produced by the primary coil and the permanent mag-
net on the rotating flywheel is cut off.
This TCI (Transistor Controlled Ignition) system greatly contributes to a compact and lightweight
engine.
1 TCI unit
2 Permanent magnet
8
1 Flywheel
2 Permanent magnet
3 Core
4 Primary coil
5 Secondary coil
69M3E11
7
1
Identification / Features and benefits
3 Flywheel
a Air gap: 0.4–0.6 mm (0.016–0.024 in)
4
5
3
2
9
6 Spark plug
7 Transistor 1
8 Transistor 2
9 Engine shut-off switch
1
1
2
3
4
5
6
7
8
6
9
S69M1130
1-6