Servo First Gear FU1K18802 for Futaba S9155 S9255 S9351  [FU1K18802]

Servomotor First Gear Replacement for Futaba S9155 S9255 S9351

This first gear is supplied as a spare component for Futaba servos S9155, S9255, and S9351. It is sold as one gear for situations where the factory gear has worn teeth, been stripped, or suffered impact damage.

Role and tuning impact: the first gear transmits motion from the motor pinion into the gear train; a damaged gear can introduce play and impair centring precision. Installing a new first gear restores correct engagement and helps maintain consistent neutral position during setup and tuning.

Installation notes: confirm the part is correct for S9155, S9255, or S9351 before opening the servo. Carefully remove the horn and housing, check splines and the mating pinion for signs of wear, align splines correctly on reassembly, and confirm smooth rotation prior to powering. Use appropriate small precision tools and avoid over-tightening fixings that may bind the gear train.