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Lycoming Cylinders

TABLE CODES:

  • S/R=Short reach spark plug.

  • L/R= Long reach spark plug.

  • N/D= Narrow deck (.255 thick).

  • N/S= Narrow deck with spot faced flange holes.

  • N/X=Narrow deck with 20 barrel cooling fins vs normal 18.

  • W/D=Wide deck (.410 thick--bolt hole pattern different from narrow deck flanged barrels).

  • T/W/D=Thin-wide deck (same bolt pattern as wide deck, but only .355 thick)

  • W/D/X=Wide deck with 17 cooling fins vs. normal 18--541 barrel

  • A= Aerobatic.

  • AE= Aerobatic engine.

  • G= Geared.

  • H= Helicopter.

  • I= Fuel injected.

  • L= Left hand rotation crankshaft.

  • M= Drone.

  • O= Opposed cylinders.

  • S= Supercharged.

  • T= Turbo-Supercharged.

  • V= Vertical.

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