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Lycoming 66K4A3Sn-01 EIS Electronic Ignition System

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Lycoming 66K4A3Sn-01 EIS Electronic Ignition System

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Part numbers : RX1-07-25424 , 66K4A3SN-01 , 07-25424
Unit of Measure: EA

2802.53 EUR / EA 2802.53 EUR 2,802.53 € excl. VAT

2802.53 EUR / EA excl. VAT

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The Lycoming EIS Electronic Ignition System, part number 66K4A3SN-01, is a solid-state electronic ignition unit for Lycoming 4-cylinder aircraft piston engines. This configuration is intended to replace a plain or retard magneto drive and operates at fixed 20° ignition timing.

Lycoming’s EIS design has no moving parts and is intended to use existing magneto-to-engine drive gears and interfaces, existing aviation spark plugs set to the applicable OEM specification, and a Slick-style ignition harness. The unit requires a constant external electrical supply of 8.5–30 VDC.

  • Manufacturer: Lycoming Engines
  • Manufacturer part number: 66K4A3SN-01
  • Configuration: 4-cylinder, plain/retard magneto replacement
  • Timing: fixed 20°
  • Unit of measure: each

Please confirm the engine model, ignition timing shown on the engine data plate, drive configuration, installation instructions, and applicable aircraft approval basis before installation. Relevant manufacturer documentation includes Lycoming Service Instruction No. 1569B, Installation, Operation and Maintenance of Lycoming EIS, and Service Instruction No. 1443T, Approved Magnetos and EIS on Lycoming Engines.

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