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Reference

Frequently Asked Questions

Experimental Starters

  • Can XP starters replace older Bendix-drive starters?

    Yes. Sky-Tec XP starters are designed as modern replacements for legacy Bendix-drive starters, offering lighter weight, improved efficiency, and kickback protection.

  • Does the starter drive need lubrication?

    If the starter uses a mechanical Bendix drive, it may occasionally need cleaning and lubrication with silicone spray only. Oil or grease should not be used because they attract dirt and can cause the drive to stick.

  • How do I determine whether my engine has a 122-tooth or 149-tooth ring gear?

    Lycoming ring gears can typically be identified by their shape:

    • 122-tooth gear: V-shaped tooth profile
    • 149-tooth gear: U-shaped tooth profile

    Always verify the ring gear configuration before ordering a starter.

  • How do I know if the shear pin needs to be replaced?

    If the starter motor spins and the pinion engages the flywheel but the propeller does not turn, the shear pin may have failed and should be replaced.

  • What is the Kickback Protection System (KPS)?

    The Kickback Protection System (KPS) protects the starter from damage if the engine kicks back during start. The system uses a sacrificial shear pin designed to fail before internal starter components are damaged. The shear pin can be replaced in the field if needed.

  • Why does my Lycoming engine kick back during start?

    Engine kickback is usually caused by improper magneto timing, weak battery voltage, or ignition firing too early during start. Kickback events can damage starters, which is why many modern starters include kickback protection systems. If kickback occurs frequently, inspect the magnetos, ignition timing, and battery condition.