In September / October of 2008, I installed a Raymarine autopilot system on my 1970 Mariner 31. It was a huge pain in the butt. However, it now works quite well and was worth the effort and expense.

The system consists of a type 1 rotary drive unit (part number RAYM81135), an S1 corepack (RAYE12114 - course computer, compass, and rudder position indicator), and a ST6002 plus controller (RAYE12098P).
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