Futaba FU1K03201 Servo First Gear Compatible with S9203 S9205 S9250  [FU1K03201]

Replacement First Gear for Futaba S9203 S9205 S9250

The FU1K03201 first gear is supplied as a Futaba replacement for S9203, S9205 and S9250 RC servos. It functions as the primary internal drive gear that transfers rotation from the motor into the gear train and is a common wear item during regular use.

Fitment is limited to the listed Futaba models, so ensure your servo case and internal gear train match the S9203/S9205/S9250 configuration before ordering. The component is supplied solo without extra fittings or packaging and is intended to swap directly into the original gear position.

Installation notes:

• Open the servo and take note of gear order and shim placement before removing parts to retain proper mesh.
• Examine adjacent gears and bearings for wear; replace any parts with damaged teeth to avoid repeat failures.
• When reassembling, set the mesh correctly and run a low-voltage bench test to confirm smooth movement before fitting back into the model.

Tuning and maintenance role:

Fitting a new first gear is a standard maintenance task that restores clean gear engagement and reduces jitter from worn teeth. Combined with output spline and bearing checks, a fresh gear helps keep steering and throttle inputs consistent on RC vehicles.