Futaba Y Cross-Arm D5mm Servo Horn for S3103/S3107/3153/3156/3157 - FUSHORN-Y  [FUSHORN-Y]

Replacement Y cross-arm for Futaba servos

The Futaba FUSHORN-Y is a Y-style servo horn intended for spare or replacement use on compatible Futaba servos, supplied in a 5-piece pack for routine maintenance or rapid part swaps at the track.

Compatibility is limited to the listed servo models: S3103, S3107, 3153, 3156, and 3157, and the horn mates to a D5mm spline output. It is produced to match the spline engagement for those servos so it installs onto the servo output shaft and uses the servo's existing fastening hardware.

Installation and tuning notes: ensure the servo is at center position before fitting, check arm orientation and control-link geometry, and confirm full travel without binding after fitting. Fitting this Y cross-arm can simplify control-link alignment and offers a mechanical method to tune leverage and throw in place of endpoint programming changes.