Teledyne TSIO-360-RB, Maintenance Manual, Page: 96 / 206

12-2
12-1 SLICK IGNITION SYSTEM DESCRIPTION
The L/TSIO-360 engines utilize two Slick (Unison) 6224 Series pressurized magnetos. The
left magneto fires the 1-3-5-lower and the 2-4-6 upper spark plugs, while the right magneto
fires the 1-3-5 upper and 2-4-6-lower spark plugs.
The Slick 6224 Series pressurized magnetos, manufactured by Slick Electro Incorporated,
530 Blackhawk Park Avenue, Rockford, Illinois 61101, are designed to provide ignition for
six cylinder light aircraft engines. The magnetos generate and distribute high tension
current through high tension leads to the spark plugs.
To obtain the retard spark necessary for starting, the magnetos employ an impulse coupling.
The impulse coupling rotates the magneto between impulse trips faster than engine
cranking speed, thus generating a better spark for starting the engine. The impulse coupling
automatically retards the spark during engine cranking, and drives the magneto.
The Slick 6224 magnetos are pressurized by engine deck pressure piped from the 2-4-6
side of the controller and overboost valve adapter.
12-2 IGNITION SYSTEM COMPONENT DETAILED DESCRIPTION
For a detailed description of magnetos and harnesses see Slick Ignition Systems Master
Service Manual Order Form F-1100 as applicable. See Related Publications Section 1-4 for
ordering information.
Magneto Drive Assembly - Each magneto is driven by a magneto drive gear, retainer and
bushings housed inside the accessory case. Two rubber bushings (per magneto) are
installed within a retainer on the drive gear. The rubber bushings provide a shock absorbing
engagement between magneto and engine drive train. The magnetos are attached to the
upper rear portion of the accessory case and secured by retainers, lockwashers and nuts.
The magneto drive gear assemblies are driven by the camshaft gear
12-3 IGNITION SYSTEM INSPECTION
WARNING
Absence of any RPM drop when checking magnetos may indicate improper
grounding in the ignition circuit. Should the propeller be moved by hand (as during
pre-flight) the engine may fire and cause injury to personnel. This type of malfunction
must be corrected prior to continued operation of the engine. Continued operation of
the engine at idle RPM with the ignition switch in the "OFF" position will verify this
malfunction.
50 HOUR INSPECTION - Compare recorded findings of operational inspection with the
following: The magneto drop for left or right magneto must be no greater than 150 RPM and
magneto spread no greater than 50 RPM with ignition timing at 20° BTC
±
1°. If magneto
drop is out of tolerance proceed to Ignition System Maintenance, Section 12-6 ignition timing
for the applicable ignition system. During magneto off check, if the engine continues to run
then see Slick service instructions.
Visually inspect high tension ignition leads for chafing, deterioration and other requirements
in accordance with Ignition System Manufacturer's instructions. Inspect magneto accessory
drive adapters for secureness and oil leaks.