Ignition System - Lawn-Boy M Series Service Manual

IGNITION SYSTEM
Solid state is a broad term applied to any
engine's ignition system which uses electronic
devices such as diodes, transistors, silicon
controlled rectifiers or other semiconductors in
place of one or more standard ignition compo-
nents.
Electronic components are extremely small,
have no moving parts, require no mechanical
adjustments and are not subjected to wear, as
with mechanical devices. They deliver uniform
performance throughout component life and
under adverse operating conditions, and can be
hermetically sealed, thus unaffected by dust,
dirt, oil or moisture.
The CD (Capacitor Discharge) system is break-
erless, with an electronic component replacing
the mechanical points and related accessories
(breaker cam, spark advance assembly, etc.).
The flywheel contains permanent magnets, but
there are no other moving mechanical parts.
The main difference between solid state and
conventional ignition is the substitution of elec-
tronic components and circuitry for mechanical
devices.
The ignition system consists of a solid state
electronic, CD Ignition Module; flywheel with a
built in permanent magnet; and a spark plug.
NOTE CD Ignition Module replaces the
breaker points, breaker cam, spark advance
assembly and coil of
a
conventional electro-
mechanical system.