BLS257 Compatible Gear Set - Futaba FUEBS3376 AS4169 EBS3376  [FUEBS3376]

Maintaining BLS257 Servo Gear Trains

This replacement gear set covers the internal mechanical train for BLS257 servos and is aimed at hobby use in RC cars, boats, and similar electric models. The kit replaces worn gears and is not an electronic or motor upgrade.

Fit these gears when you experience slop, noise, or degraded centring performance. New gears reinstate correct mesh and consistent end-point behaviour without altering motor or control electronics. The components suit regular servicing and incremental tuning rather than high-output conversions.

Fitting checklist: remove the servo cover, photograph or note gear sequencing and shim placement, and keep parts organized during the job. Once reassembled, turn the output spline by hand to ensure smooth engagement before supplying power, then recalibrate neutral on your transmitter.

Performance tips: gentle mesh refinement and correct horn alignment improve responsiveness and cut noise; do not overtighten gear engagement which shortens life. Reinstall bearings and spacers exactly as removed to preserve axial alignment.