Futaba FP-S25 Sail winch - RC Groups
Thread Tools
Jun 12, 2008, 11:14 PM
Registered User

Futaba FP-S25 Sail winch

I have an EC-12 which I just bought and it has this servo in it to control jib tweaking. On the servo are these markings:

Sail Servo

The wires are cut off and I suspect that it's burned out. I would like to replace it. I've searched many sites that have servo specs but this one is not listed in any of them. Does anyone have an idea what the specs for this are? Torque? Travel?

Last edited by Usagi_Chan; Jun 12, 2008 at 11:20 PM.
Sign up now
to remove ads between posts
Jun 12, 2008, 11:49 PM
Registered User
Ed Morales's Avatar
that must be a futaba s125, discontinued, replaced by the futaba s3802.
Jun 13, 2008, 03:45 AM
Registered User

I did just find it in Futaba's discontinued list here:

They say the replacement is a 3801 but your suggestion does actually seem closer in torque values.

Jun 13, 2008, 04:00 AM
Registered User
Ed Morales's Avatar
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.

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Futaba FP-T7UAP tony houk Power Systems 3 Sep 04, 2009 09:38 PM
Discussion Need info on old Futaba FS-10 Sail winch chall Sailboats 8 Jun 01, 2007 08:39 AM
Futaba FP-S9202 servo forsale stealthy Aircraft - Electric - Airplanes (FS/W) 0 Nov 14, 2001 12:59 AM
Futaba FP-MC114H ESC for Heli or Aircraft YVR Aircraft - Electric - Airplanes (FS/W) 1 Nov 06, 2001 11:31 AM
WTB Futaba FP-TP-FM module on 53mhz Bobski Aircraft - Electric - Airplanes (FS/W) 0 Aug 01, 2001 03:52 AM