Thread: Discussion Futaba FP-S25 Sail winch
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Old Jun 13, 2008, 03:00 AM
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3801 is bigger in dimensions as well as torque output. the 3802 is the replacement for the s125. i have all three of these sail servos. the s125 has a square output shaft so you need square holed servo arms, while the 3802 has the splined ones.
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