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Lycoming 66K4A3Sn-02 EIS Electronic Ignition System

Lycoming 66K4A3Sn-02 EIS Electronic Ignition System

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Part numbers : RX1-07-25425 , 66K4A3SN-02 , 07-25425
Unit of Measure: EA

2701.37 EUR / EA 2701.37 EUR 2,701.37 € excl. VAT

2701.37 EUR / EA excl. VAT

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Availability
Up to 2 EA ready to ship on Monday 2026-09-07
Order before 17:00 CET on Friday 2026-09-04

The Lycoming EIS Electronic Ignition System, manufacturer part number 66K4A3SN-02, is a solid-state electronic ignition module configured for a 4-cylinder, non-impulse (plain-drive) magneto replacement application with fixed 25° timing.

Lycoming describes its EIS as a drop-in-capable magneto replacement designed to support straightforward installation and engine starting. Its solid-state design has no moving parts and is intended to reduce scheduled maintenance requirements compared with a conventional magneto.

  • Manufacturer: Lycoming Engines
  • Manufacturer part number: 66K4A3SN-02
  • Configuration: 4-cylinder, plain-drive / non-impulse magneto replacement
  • Timing: Fixed 25°
  • Listed weight: 2.268 kg
  • Unit of measure: Each

For correct selection and installation, confirm the engine model, ignition timing, drive configuration and applicable installation approval against the latest Lycoming Service Instruction No. 1443 and Service Instruction No. 1569 before fitting.

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