BLS257 Servo Gear Replacement Kit FUEBS3376 for Futaba AS4169 EBS3376  [FUEBS3376]

Servicing BLS257-Type Futaba Servos

This replacement set provides the mechanical gears needed to service BLS257 servos in model applications. It concentrates on the internal gear train and is intended for hobby use in electric RC cars, boats, and other models that accept the BLS257 servo layout.

Use this kit when gears exhibit wear, excessive play, or intermittent centring. Swapping in new gears helps reestablish proper gear mesh and consistent end-point action without modifying electronic settings. The kit is aimed at regular maintenance and light tuning rather than major power changes.

Practical fitting advice: carefully remove the servo shell, note each gear and any thin shims, and keep components in order on a tray. After refitting, rotate the output spline by hand to confirm smooth mesh before powering up, then set neutral with your transmitter.

Tuning notes: minimal adjustments to gear mesh and servo horn angle can cut noise and boost responsiveness; avoid tight preload which shortens service life. Preserve any bearings or spacers in their original positions to maintain alignment.