Futaba Servo Case Upgrade for S3117 S3157 - FUAS3273  [FUAS3273]

Futaba FUAS3273 Case for Servo Rebuilds

The Futaba FUAS3273 servo case set fits Futaba S3117 and S3157 servos and is referenced under the original codes AS3273 and EBS3357. It is supplied without retail packing and intended as a replacement housing for hobby servo rebuilds.

This case supplies the external shell and mounting features that position the PCB and gearbox within the unit. Swapping to a replacement case restores the original mounting dimensions so the servo aligns with radio tray cutouts and horn fittings.

Fitting the case is straightforward for experienced hobbyists: remove the servo from the model, disconnect motor or lead wires as required, open the old case with the correct hex driver, transfer the internals into the new housing, set gear mesh and travel limits, then reassemble and bench-test before refitting. Typical servo tools are adequate.

Use this case set when repairing impact damage, adjusting mount points, or prepping a servo for bench tuning; it is intended for RC-scale hobby use and not for automotive or full-size applications.