Futaba FUEBS3376 BLS257 Servo Gear Set AS4169 EBS3376  [FUEBS3376]

BLS257 servo gear replacement

This gear set is a direct spare component option for maintaining or repairing BLS257-class servos in model applications. The kit focuses on the mechanical gear train portion only and is intended for hobby-scale use on electric model cars, boats, and other radio-controlled assemblies where the BLS257 servo form factor is used.

Use this set when you detect gear wear, audible backlash, or loss of consistent centring. Replacing degraded gears restores gear mesh quality and repeatable end-point behaviour without altering electronic settings. The parts are intended for routine service and light performance tuning rather than major power upgrades.

Installation tips: remove the servo case, note the original gear stack order, keep any small shims or washers in sequence, and use a clean work area to avoid losing small parts. After reassembly, verify mesh by hand-turning the output spline before reconnecting power, then perform a neutral-centre calibration with your transmitter.

For tuning: small adjustments to gear mesh and servo horn positioning can reduce noise and improve responsiveness; avoid excessive preload which shortens gear life. If the servo uses ball bearings or specific spacers, keep those components matched to their original positions to maintain alignment.