Futaba S9203/S9205/S9250 First Gear Replacement - FU1K03201  [FU1K03201]

Futaba Servo First Gear for S9203, S9205 and S9250

This FU1K03201 first gear is a Futaba replacement part intended for RC-scale servos S9203, S9205 and S9250. It serves as the internal drive gear that transmits motion from the motor to the gear train, and is a common wear item replaced during servo rebuilds.

Compatibility is limited to the listed Futaba models, so confirm your servo case and gear stack match the S9203/S9205/S9250 layout before ordering. The part is supplied without additional hardware or packaging and is intended as a direct swap for the original first gear in matching servos.

Installation notes:

• Remove the servo cover and note gear positions before disassembly to preserve mesh and shimming.
• Inspect surrounding gears and bearings for wear; replace any stripped or damaged teeth before refit.
• Reassemble with correct mesh and test on the bench at low voltage to confirm smooth operation prior to fitting in a model.

Tuning and maintenance role:

Replacing the first gear is part of routine servo servicing to restore precise feedback and reduce jitter caused by worn teeth. When paired with a check of the servo output spline and bearings, a fresh first gear helps maintain predictable steering and control inputs on RC models.