IGNITION SYSTEMS

L-1318 Consolidated Application Data Scope This reference manual provides complete application data for Slick FAA/PMA approved magnetos and ignition harnesses, SlickSTART™ Magneto start booster, and Autolite by Unison spark plugs, as well as kit contents, application dimensions, and technical information on all Slick engine ignition products manufactured by Unison Industries. Revised 08-01-1999. Unison Contents Aircraft magnetos SlickSTART™ • Descriptive part no. explanation • SlickSTART™ part no. • Rotation, lag angle and retard angle How to use this manual and abbreviations • Magneto installation orientation – right and left • Abbreviations used in this manual UNISON • Core policy Application data for Lycoming 4- engines • Rebate program Application data for Lycoming 6-cylinder engines Ignition harnesses Application data for Teledyne Continental 4-cylinder engines • Ignition wire Application data for Teledyne Continental 6-cylinder engines

IGNITION SYSTEMS • Magneto end termination Application data for Franklin engines • end termination Slick ignition upgrade kit contents • Mounting hardware • Lycoming 4-cylinder ignition upgrade kits • Custom colors • Lycoming 6-cylinder ignition upgrade kits • Rebate program • Teledyne Continental 4-cylinder ignition upgrade kits Aircraft spark plugs • Teledyne Continental 6-cylinder ignition upgrade kits • Descriptive spark plug part no. • PZL/Franklin 4-cylinder ignition upgrade kits • Resistors • PZL/Franklin 6-cylinder ignition upgrade kit • Barrel style Universal harness kit contents • Mounting thread and reach • Universal harness kits • Heat rating • Individual leads • Electrode design • Dual harness kits

Aircraft Magnetos Descriptive part no. explanation Lag angle – impulse coupled magnetos Unison Industries utilizes a descriptive part numbering system for both Slick The impulse coupling is a mechanical device to assist in engine starting. At low magnetos and Slick ignition upgrade kits. cranking speed, the magneto impulse coupling retards the magneto ignition timing Magneto part numbering until the engine is at its proper position for starting. The lag angle, noted on the magneto dataplate, is the impulse coupling’s retard angle measured in Current production magnetos have four digits in the part number and an optional degrees. After engine start, the impulse coupling disengages and returns the suffix. The first two digits indicate the series: 43xx – 4300 Series for 4-cylinder magneto to normal engine timing. engines 63xx – 6300 Series for 6-cylinder engines. The last two numbers indicate the model number. Lag angle – retard breaker magnetos An R suffix indicates factory rebuilt. The retard breaker assembly is an electrical device powered by the aircraft battery, Example: 4371=4300 Series four-cylinder, number 71 used to aid in starting the engine. At low cranking speed, the retard breaker retards Rotation the magneto ignition timing until the engine crankshaft is at its proper position for starting. The lag angle, noted on the magneto dataplate, is the retard breaker’s Rotation specifies the direction that the magneto rotor shaft turns when viewed retard angle measured in degrees. When the engine disengages, the retard from the mounting end of the magneto. Left-hand rotation is counterclockwise breaker assembly is also disengaged and the magneto returns to normal engine when viewed from the magneto mounting end. Right-hand rotation is clockwise timing. when viewed from the magneto mounting end. Magneto installation orientation – right and left Important: Check the dataplate on the magneto being replaced for the shaft rotation. Replace with a magneto with the same rotation. In most cases, right and left magneto positions are referenced from the rear of the engine, i.e., from the pilot’s perspective, reference engine and/or airframe manufacturer’s literature.

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