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

Y cross-arm compatible with Futaba servos

The Futaba FUSHORN-Y is a Y-style servo horn supplied as a straightforward spare or replacement for compatible Futaba servo models. This pack of 5 pcs is intended for hobby-scale RC applications where quick part changes are needed.

Compatibility is limited to the listed servo models: S3103, S3107, 3153, 3156, and 3157, and the horn mates to a D5mm spline output. Manufacturing matches the spline engagement on those servos so the horn fits onto the servo output shaft and uses the servo's existing fastening hardware.

Installation and tuning notes: ensure the servo is centered before mounting the horn, check arm orientation and linkage geometry, and confirm there is full travel with no binding after installation. Changing to this Y cross-arm can improve control-link alignment and offers a simple way to modify leverage and throw through mechanical setup adjustments.