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Home / Engine Parts / Ignition Systems / Lycoming /Lycoming EIS Fixed Timing Magneto Replacement
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Lycoming EIS Fixed Timing Magneto Replacement

0 Reviews 3 Answered Questions
From $2595.00 to $3000.00
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OEM PN Cylinders Drive Type Degrees PN Price Buy
66K4A3SN-014 CylindersPlain Drive20
07-25424
$2640.00
Quantity
66K4A3SN-024 CylindersPlain Drive25
07-25425
$2685.00
Quantity
66K4F3SN-014 CylindersImpulse Drive20
07-25426
$2595.00
Quantity
66K4F3SN-024 CylindersImpulse Drive25
07-25427
$2641.00
Quantity
66K4D3SN-016 Cylinders--20
07-25428
$2795.00
Quantity
66K4D3SN-026 Cylinders--25
07-25429
$2816.00
Quantity
66K4D3SN-036 Cylinders--23
07-25430
$2799.00
Quantity
66K4D3SN-046 Cylinders--20
07-25431
$2799.00
Quantity
66K4A3SN-046 Cylinders--
(Reverse Rotation)		20
07-25433
$3000.00
Quantity
Subtotal $0.00
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Overview

The Lycoming EIS is a drop-in capable replacement for magnetos and provides easy installation and engine startability. Lycoming EIS is designed to go to TBO and does not include a Lycoming-scheduled maintenance requirement. It meets the ever-growing performance requirements of modern-day aircraft design, including less maintenance, lower weight, and more spark control than a traditional magneto.

The Lycoming EIS was developed by SureFly Partners, Ltd. with input from Lycoming’s engineering teams to meet Lycoming’s exacting specifications. With over two years of research and development, including exhaustive endurance and durability testing, the Lycoming EIS is the only electronic ignition system on the market with the proven performance necessary to bear the Lycoming name. The Lycoming EIS utilizes a solid-state design that has no moving parts and nearly eliminates scheduled maintenance requirements.
   
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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Eligibility

Drive Types:
IC = EIS replacing Impulse Coupled magneto.
P / R = EIS replacing Plain or Retard magneto. Drive types do not differ for 540 series engines.

EIS is available in 3 fixed timing options: 20⁰, 23⁰, & 25⁰ to be matched to the timing degrees on the engine data plate.

ENGINE MODEL Ignition Timing BTC Left EIS Right EIS
*Drive Type Part Number *Drive Type Part Number
O-235-C1 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-C1B 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
O-235-C2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-C2C 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-E2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-F2A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-235-F2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-G1 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-G2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-H2C 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-J2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-235-K2B 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
O-235-K2C 20° IC 66K4F3SN-01 P / R
     IC		 66K4A3SN-01
     66K4F3SN-01
O-235-L2A 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
O-235-L2C 20° IC 66K4F3SN-01 P / R
     IC		 66K4A3SN-01
     66K4F3SN-01
O-235-N2A 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
O-235-N2C 20° IC 66K4F3SN-01 P / R
     IC		 66K4A3SN-01
     66K4F3SN-01
O-290-D 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-290-D2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-290-D2C 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
O-320-A2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-A2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-A2C 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
O-320-A2D 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-A3A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-A3B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-B1A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-B2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-B2B 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-320-B2C 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
O-320-B2D 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-B2E 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-B3B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-D1A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-D1D 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-D1F 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-D2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-D2B 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
O-320-D2G 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-D2J 25° IC 66K4F3SN-02 IC 66K4F3SN-02
O-320-D3G 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-320-E1A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E1C 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E1F 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E2C 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E2D 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-320-E2F 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E2G 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-320-E3D 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-320-B1A 25° IC 66K4F3SN-02 IC 66K4F3SN-02
IO-320-B1C 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-320-C1A 25° IC 66K4F3SN-02 IC 66K4F3SN-02
IO-320-D1A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-320-D1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-320-E1A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-320-E1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-320-E2A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
IO-320-E2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AIO-320-A1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
AIO-320-A1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AIO-320-A2A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
AIO-320-A2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AIO-320-B1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AIO-320-C1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
LIO-320-B1A 25° IC 66K4F3SN-02 IC 66K4F3SN-02
LIO-320-C1A 25° IC 66K4F3SN-02 IC 66K4F3SN-02
AEIO-320-D1B 25° P / R
     IC		 66K4A3SN-02
     66K4F3SN-02		 P / R 66K4A3SN-02
AEIO-320-D2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AEIO-320-E1B 25° IC 66K4F3SN-02 IC 66K4F3SN-02
AEIO-320-E2B 25° IC 66K4F3SN-02 IC 66K4F3SN-02
O-360-A1A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A1D 25° P / R
     IC		 66K4A3SN-02
     66K4F3SN-02		 P / R 66K4A3SN-02
O-360-A1F6 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A1G6 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-A1H 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A1H6 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A1P 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A2A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A2F 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-A2G 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A3A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A4A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-A4G 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A4J 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-A4K 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-A4M 25° P / R
     IC		 66K4A3SN-02
     66K4F3SN-02		 P / R
IC		 66K4A3SN-02
     66K4F3SN-02
O-360-A4N 25° IC 66K4F3SN-02 IC 66K4F3SN-02
O-360-A4P 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-B2A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-B2C 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-C1A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-C1E 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-C1F 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-C1G 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-C2A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-C2C 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
O-360-C2E 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-C4F 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
O-360-C4P 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
O-360-F1A6 25° IC 66K4F3SN-02 IC 66K4F3SN-02
O-360-G1A6 25° IC 66K4F3SN-02 IC 66K4F3SN-02
O-360-J2A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
HO-360-C1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
IO-360-A1A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-360-A1B 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-A1B6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-A1D 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-A1D6 20° P / R
     IC		 66K4A3SN-01
     66K4F3SN-01		 P / R 66K4A3SN-01
IO-360-A2A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-360-A2B 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-A2D 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-360-A3B6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-B1B 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
IO-360-B1E 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
IO-360-B1F 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
IO-360-B1F6 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
IO-360-B1G6 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
IO-360-B2E 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-360-B4A 25° P / R
     IC		 66K4A3SN-02
     66K4F3SN-02		 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
IO-360-C1A 20° P / R 66K4A3SN-01
     66K4A3SN-01		 P / R
     IC		 66K4F3SN-01
IO-360-C1B 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-360-C1C 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-C1C6 20° IC 66K4F3SN-01 P / R
     IC		 66K4A3SN-01
     66K4F3SN-01
IO-360-C1D6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-C1E6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-C1F 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
IO-360-C1G6 20° P / R 66K4A3SN-05 P / R 66K4A3SN-05
IO-360-D1A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-360-F1A 25° P / R 66K4F3SN-02 IC 66K4A3SN-02
IO-360-L2A 25° IC 66K4F3SN-02 IC 66K4F3SN-02
IO-360-M1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
IO-360-M1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
IO-360-N1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
IO-360-P1A 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
LO-360-A1H6 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
AIO-360-A1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
AIO-360-A1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AIO-360-A2A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
AIO-360-A2B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AIO-360-B1B 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
HIO-360-D1A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
HIO-360-G1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
LIO-360-B1G6 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
LIO-360-C1E6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
LIO-360-M1A 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
TIO-360-A1A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
TIO-360-A1B 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
TIO-360-A3B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-360-A1A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-360-A1B 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
AEIO-360-A1B6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
AEIO-360-A1D 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
AEIO-360-A1E 20° IC 66K4F3SN-01 P / R
     IC		 66K4A3SN-01
     66K4F3SN-01
AEIO-360-A1E6 20° IC 66K4F3SN-01 P / R 66K4A3SN-01
AEIO-360-A2C 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-360-B1B 25° P / R 66K4A3SN-02 P / R 66K4A3SN-02
AEIO-360-B1F 25° P / R
     IC		 66K4A3SN-02
     66K4F3SN-02		 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
AEIO-360-B1G6 25° IC 66K4F3SN-02 IC 66K4F3SN-02
AEIO-360-B1H 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
AEIO-360-B2F 25° IC 66K4F3SN-02 P / R
     IC		 66K4A3SN-02
     66K4F3SN-02
AEIO-360-B4A 25° IC 66K4F3SN-02 P / R 66K4A3SN-02
AEIO-360-H1A 25° IC 66K4F3SN-02 IC 66K4F3SN-02
AEIO-360-H1B 25° IC 66K4F3SN-02 IC 66K4F3SN-02
IO-390-A1A6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-A1B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-A3A6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-A3B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-C1A6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-C1B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-C3A6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
IO-390-C3B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
HIO-390-A1A 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-390-A1A6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-390-A3A6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-390-A1B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
AEIO-390-A3B6 20° P / R 66K4A3SN-01 P / R 66K4A3SN-01
O-540-A1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A1B5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A1C5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A1D5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A4A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A4D5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-A4E5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-B1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-B2B5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-B2C5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-B4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-E4A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-E4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-E4C5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-F1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-F1B5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-G1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-G2A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-H2A5 25° * 66K6D3SN-02 * 66K6D3SN-02
O-540-J3A5 23° * 66K6D3SN-03 * 66K6D3SN-03
IO-540-A1B5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-AG1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-C4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-C4D5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-D4A5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-D4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-E1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-E1B5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-G1D5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1B5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1D5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1E5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1F5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1G5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1H5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1J5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-K1K5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-L1C5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-M1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-M1C5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-N1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-R1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-T4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-V4A5 25° * 66K6D3SN-02 * 66K6D3SN-02
IO-540-W1A5 23° * 66K6D3SN-03 * 66K6D3SN-03
IO-540-AA1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-AA1B5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-AB1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-AC1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-AE1A5 20° * 66K6D3SN-01 * 66K6D3SN-01
IO-540-AF1A5 25° * 66K6D3SN-02 * 66K6D3SN-02
HIO-540-A1A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-A2B 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-A2C 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-J2B 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-U2A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-W2A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AE2A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AF1A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AF1B 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AG1A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AH1A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AJ1A 20° * 66K6D3SN-01 * 66K6D3SN-01
TIO-540-AK1A 23° * 66K6D3SN-03 * 66K6D3SN-03
AEIO-540-D4A5 25° * 66K6D3SN-02 * 66K6D3SN-02
AEIO-540-D4B5 25° * 66K6D3SN-02 * 66K6D3SN-02
AEIO-540-D4D5 25° * 66K6D3SN-02 * 66K6D3SN-02
AEIO-540-L1B5 20° * 66K6D3SN-01 * 66K6D3SN-01
AEIO-540-L1D5 20° * 66K6D3SN-01 * 66K6D3SN-01
LTIO-540-J2B 20° * 66K6D3SN-04 * 66K6D3SN-04
IO-580-B1A 20° * 66K6D3SN-01 * 66K6D3SN-01
AEIO-580-B1A 20° * 66K6D3SN-01 * 66K6D3SN-01

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Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: If the Lycoming EIS is made by SureFly, what exactly are the differences....other than color? I heard something about it being software, but what are the actual differences. Thanks

Per MFG.: "There are minor differences that are proprietary that we cannot discuss & they only have fixed timing."

Q: So can you only use this in the place of the left mag or can you replace both magnetos?

Per the latest revision of SI 1443, by default, this unit may be installed on either side.

Q: Can you run 2 of these or run a SureFly an one of these and a SureFly?

Per Surefly: In regards to the Lycoming Electronic Ignition you would need to consult with them. We suggest you refer to Lycoming Service instruction 1569A. The Surefly Ignition Module is limited to one per installation on current certified aircraft. If used on an experimental aircraft two SIMs may be utilized provided that a secondary battery backup and stand by alternator are used, such as provided by TCW technologies Integrated Battery Backup System.