Futaba S3103/S3107/3153/3156/3157 Y Servo Horn D5mm - FUSHORN-Y by Futaba  [FUSHORN-Y]

Y-shaped horn for Futaba units

This Futaba FUSHORN-Y accessory is a Y-shaped servo horn built as a direct replacement or spare for compatible Futaba servos. The set includes 5 pcs, aimed at hobby-scale RC use for maintenance spares and fast track-side swaps.

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 align with 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: center the servo before fitting the horn, confirm the arm orientation and control-link geometry, and verify full travel without binding after installation. Swapping to this Y cross-arm helps with control-link alignment and provides a simple mechanical method to alter leverage and throw rather than changing electronic endpoints.