Futaba FUEBS3376 BLS257 Servo Gear Set AS4169 EBS3376  [FUEBS3376]

BLS257 Gear Set Overview

This gear set serves as a direct replacement option for BLS257-class servos used in model projects. The kit replaces the mechanical gear train only and is aimed at hobby use in electric model cars, boats, and other radio-controlled assemblies built around the BLS257 form factor.

Fit this set when you notice worn teeth, audible backlash, or inconsistent centring. Installing fresh gears restores mesh quality and repeatable end-point behaviour without changing the servo electronics. The parts target routine servicing and modest performance tuning rather than high-power upgrades.

Installation tips: open the servo case, record the original gear stack order, retain any shims or washers in sequence, and work on a clean tray to avoid losing small parts. After reassembly, check mesh by hand-turning the output spline before reconnecting power, then perform a neutral-centre calibration with your transmitter.

Tuning guidance: small gear mesh tweaks and careful servo horn positioning reduce noise and sharpen response; avoid applying excessive preload which accelerates wear. If the servo uses bearings or spacers, reinstall those items in their original positions to preserve alignment.