According to NLA marine, seems your findings are on track,
Steering Cable Details Cable Manufacturer: Teleflex Manufacturer Part Number: Teleflex SSC72 15FT / SSC7215 From The SSC72 series (which is the earlier style that was threaded on both ends and is only compatible with those helms that the steering cable threads on to vs. the new style that is...
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Might be worth a call or live chat,
https://www.marineparts.com/p-27816-15-safe-tbig-t-steering.aspx
Probably to small but there's a used 14-ft in here,
Find many great new & used options and get the best deals for SSC72 14ft Teleflex Steering Cable SSC7214 Teleflex Inc. (USA) at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Found a 25-footer still new,
https://www.greatlakesskipper.com/t...-t-big-t-rotary-old-style-boat-steering-cable
Get the best deals for Ssc72 at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!
www.ebay.com
Just for reference, the image below is what the Octopus Steering Cable Adapter Kit f/TFX SSC72, Uflex M47 & Morse 304415 is for... To bad there wasn't an adaptor style that would go from a newer quick connect cable end to a threaded end for a case like this.
For sale is a steering cable adapter for use with Octopus Type-S and Type-T autopilot drive mechanisms. It allows the Octopus drive to be connected to Teleflex SSC72, Uflex M47, and Morse 304415 steering cables. It may also allow the connection of other steering cables that have the same dimensions as the aforementioned steering cables. Please thoroughly research your steering cable to ensure this adapter is the proper one you need.
