This replacement gear kit is designed for the Futaba BLS151 servo family and references the service codes AS4162 and EBS3369. It is an RC-scale component intended to repair worn gear trains and support precise servo setup work.
Use the kit if you notice gear play, stripped teeth, or inconsistent gear rotation. The packaging and labels match the service part numbers used with BLS151 units, so verify your servo model and part codes prior to purchase. Ensure the servo is powered down and disconnected from receivers before beginning any work.
Typical installation: remove the servo cover, note the order of gears and bearings, swap the defective gears for the new set while maintaining original orientations, then reassemble and check gear mesh and endplay. Run a neutral-centre and limited travel test on the bench before refitting to the model.
Replacing the gear set reduces mechanical backlash and helps maintain predictable control inputs, which supports accurate setup and on-track or field tuning consistency.
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