Futaba S9203 S9205 S9250 Servo First Gear - FU1K03201  [FU1K03201]

FU1K03201 First Gear for Futaba S9203 S9205 S9250

This FU1K03201 first gear is a Futaba replacement part for S9203, S9205 and S9250 RC servos. It is the internal drive gear that relays motion from the motor into the gear stack and is commonly replaced during servo servicing to address wear.

Compatibility is restricted to the specified Futaba models, so check that your servo's internal arrangement matches the S9203/S9205/S9250 layout before purchasing. The gear is supplied on its own with no extra hardware or packing and is intended to be a direct swap for the original component.

Installation notes:

• Remove the servo shell and note gear positions and shim spacing before disassembly to retain original mesh.
• Inspect neighbouring gears and bearings for damage; replace any parts with worn or missing teeth to prevent further failures.
• Refit using the correct mesh and verify smooth rotation at low voltage on the bench prior to reinstalling in the model.

Tuning and maintenance role:

Fitting a new first gear is a basic service action that helps restore precise feedback and reduce control jitter caused by worn teeth. Alongside checks of the output spline and bearings, a new gear supports reliable steering and control inputs.