Piper Arrow IV Turbo Maintenance Manual page 635

GENERAL. (PA-28RT-201)
DESCRIPTION AND OPERATION.
The S-1200 series magneto used on this engine is a completely self-contained unit featuring a rotating
magnet and a two lobe cam which operates the main breaker points. This magneto uses an impulse coupling to
provide reliable ignition at engine cranking speed. At low engine cranking speeds the impulse coupling
automatically retards the magneto until the engine is also at its retarded firing position. The spring action of the
impulse coupling is then released to spin the rotating magnet and produce the spark required to fire the engine.
When the engine is running, the impulse coupling acts as a drive coupling for the magneto.
TROUBLESHOOTING.
Trouble
Failure of engine to start.
Failure of engine to idle
properly.
Low power and uneven run-
ning.
Failure of engine to develop
full power.
Effectivity
PA-28RT-201
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
CHART 7402. TROUBLESHOOTING (MAGNETO)
Defective spark plugs.
Defective ignition wire.
Defective battery.
Improper operation of
magneto breaker.
Faulty ignition system.
Defective spark plugs.
Magneto breaker points not
working properly.
Defective ignition wire.
Defective spark plug termi-
nals connectors.
Faulty ignition.
3E7
Cause Remedy
Clean and adjust or replace
spark plugs.
Check with electric tester and
replace defective wires.
Replace with charged battery.
Check points. Check internal
timing of magnetos.
Check entire ignition system.
Clean and gap or replace
spark plugs.
Clean points. Check internal
timing of magnetos.
Check wire with electric
tester. Replace defective wire.
Replace connectors on spark
plug wire.
Tighten all connections.
Check system with tester.
Check ignition timing.
74-02-00
Page 74-22
December 1, 1978