General; Ignition Systems Description - Continental Motors TSIOL-550-C Operation, Maintenance & Installation Manual

General

This chapter describes the Slick 6320 ignition
system installed on TSIOL-550-C engines and
provides scheduled maintenance information.
Ignition System Description
Two magnetos generate high voltage current and
distribute it through high tension leads to the spark
plugs. Each magneto fires one of the two spark
plugs in each cylinder. This dual ignition system
provides two important benefits:
1. If one magneto system fails, the ignition
system continues to operate with the other
magneto.
2. With both magneto systems operating, the
fuel/air in each cylinder burns more efficiently
and the engine develops more power.
Minor changes in magneto timing are to be
expected during normal engine service. The time
and effort required to check and adjust the
magnetos to specifications is slight and will result
in longer contact point life, smoother engine
operation, and reduced corrective maintenance
between routine inspections.
The left magneto fires the 1-3-5 lower and the 2-4-6
upper spark plugs. The right magneto fires the 1-3-5
upper and 2-4-6 lower spark plugs. The magnetos
are pressurized by engine deck pressure piped from
the aftercooler.
An impulse coupling generates the retard spark
necessary for starting. The impulse coupling rotates
the magneto between impulse trips faster than
engine cranking speed which generates a better
spark for starting the engine. The impulse coupling
automatically retards the spark during engine
cranking and drives the magneto.
Each magneto has two rubber bushings installed in a
retainer on the drive shaft to provide a shock
absorbing engagement between the magneto and the
engine drive train.
Two magneto drive adapters are attached to the
upper rear portion of the crankcase and secured by
eight studs, washers and nuts. The magneto drive
gear assemblies are installed in the front of the
adapter and meshed in the proper position with the
idler gear.
The magnetos are attached to the front side of the
upper rear portion of the crankcase and are secured
by four studs, washers, and nuts.
For a detailed description of magnetos and ignition
wire harnesses, refer to Slick Ignition Systems
information.
Inspection
The magnetos must be inspected at:
• 100 hours
• 500 hours
• Annually
and must be overhauled at engine overhaul or at
four calendar year intervals, whichever occurs first,
in accordance with the Slick Aircraft Products
4300/6300 Series Magneto Maintenance and
Overhaul Manual number L-1363B.
Perform all scheduled inspections on the magneto
and ignition harness in accordance with the
manufacturer's instructions.
WARNING
Maintenance of spark plugs and spark plug leads
is necessary to insure pro-per magneto operation.
Failure to maintain the spark plugs and ignition
harness leads in good condition will result in
ignition system malfunction and subsequent
engine malfunction.
WARNING
Absence of RPM drop when checking the
magnetos may indicate improper grounding in
the ignition circuit. If the propeller is moved by
hand (during preflight, for instance), the engine
may fire causing injury or death. Investigate and
eliminate all improper ignition circuit grounding
points before further operation. Ignition circuit
grounding can be verified if the engine continues
to run with the ignition switch off.
Ignition
8-3