The 655845 Magneto Drive Gear is a precision engine gear used in Continental aircraft piston engines to transmit rotational power from the engine accessory drive system to the magneto assembly. It ensures synchronized operation of the ignition system with engine timing.

This gear is manufactured to strict aerospace tolerances to ensure smooth meshing, minimal backlash, and reliable torque transfer under continuous engine operation.

Its primary functions include:

Driving the magneto from the engine accessory geartrain
Maintaining precise ignition timing synchronization
Transferring rotational power with minimal loss and wear

Magneto drive gears like the 655845 are critical to engine ignition reliability, directly affecting combustion timing, engine smoothness, and overall operational safety.