My speedo was not displaying so I bought, on this forum, an ST60 Tridata. Therefore, I now have for sale
(now Raymarine) ST50 depth
. There are three pig tails on the back. Two are used for connecting to other Autohelm/Raymarine devices. These are three pin connections with the old style barrel connectors. The transducer
pigtail has blue, black and bare leads. This unit was working fine when I replaced it. $50 plus shipping
(now Raymarine) ST50 speed display head
. It is this unit that motivated me to move up to the ST60 tridata. The screen
on this unit is so weak that one must sit in just the right place to read it. There are three pig tails: two for seatalk
connections and one for the transducer
. The transducer pigtail has red, yellow and bare leads. Free
. Yours if you think you can get some life out of the display.
3. For ST60 system: one ~14.5" Seatalk
connector for joining adjacent display heads. The part number is 4001-138-A. The plug
on each end is female for three prongs. $20 plus shipping.
4. Airmar p19 depth
transducer P/N 31-188-4-02 (&1158). This came with the ST60 I bought, but I don't need it. The diameter of the threaded barrel that screws into the thru-hull is 2". If you don't already have the threaded thru-hull then you will have to buy it. The three leads are blue, black and bare. The wire lead is ~42 feet. There is no connector on the end. $50 plus shipping.
5. Airmar speed and temperature transducer, ST800-P120-RETR, p/n 31-487-1-02 (&1158). This also came with the ST60 I bought, but I don't need it. The five leads are red, white, bare, green and brown. The tiny female spade connectors that fit the ST60 pins are intact. About ~40 feet of wire. The diameter of the sensor that goes through the hull
is 1 3/16" (30 mm). You will need to buy the airmar thru-hull fitting in order to use this retractable unit. $50 plus shipping.
for items 1 and 2 are easily found on the WWW.