Lycoming 61665 Magneto Impulse Coupling Gear is a precision-engineered ignition system component designed for use in compatible Lycoming aircraft piston engines. The gear is part of the magneto impulse coupling assembly, which provides proper drive engagement and assists reliable magneto operation during engine starting and normal operation.

The impulse coupling system allows the magneto to rotate at the required speed while providing a temporary mechanical delay and accelerated rotation during engine cranking. The 61665 gear transfers rotational movement within the assembly, supporting dependable ignition timing and consistent spark generation, especially during engine start conditions.

Manufactured to Lycoming specifications, the magneto impulse coupling gear is designed to withstand repeated engagement cycles, engine vibration, and the mechanical loads generated within the accessory drive system. Precision gear geometry ensures proper interaction with related magneto components for reliable ignition system performance.

The impulse coupling gear should be inspected during magneto maintenance, ignition system servicing, or engine overhaul procedures. Signs of excessive wear, damaged gear teeth, cracking, or improper engagement may require replacement to maintain dependable magneto operation and engine starting performance.

Key Features

- Part Number: 61665
- Manufacturer: Lycoming Engines
- Component: Magneto Impulse Coupling Gear
- Provides rotational drive within the magneto impulse coupling assembly
- Supports reliable engine starting and ignition timing
- Precision-manufactured for accurate gear engagement
- Designed to withstand vibration, cyclic loading, and repeated ignition system operation
- Suitable for compatible Lycoming aircraft engines