As stated for the hydraulic steering, you need another helm, steering wheel, and set of outboard hoses (FYI - that's what Searstar calls them) to connect helm 1 to 2, plus a "dual station" kit from Teleflex. See: http://www.seastarsteering.com/
Note: the dual station kit has nylon hose and fittings that runs a "balancing line" from the main helm to the aux helm. You STILL need the heavy outboard (pressure tested) hoses that also run from the L & R port of the main helm to the aux one. You also need to place a non-vented fill cap on the hlem that is physically lower than the other helm, which gets the vented fill cap.
You can use your existing long "OB steering hoses to your main helm and plumb new shorter OB steering hoses to the aux one, further back on your boat. I just went through this whole ordeal rigging a dual station on a 25' Parker sport cabin. Call 604-270-6899 for Technical Support on Seastar steering units. CONTROLS:
You need Morse-type controls that have separate clutch and throttle, like their old Twin-S series or their newer MT (I believe) series. FWIW I just bought a mint pair of Twin-S controls off of eBay for $160. Seafit also makes one for around $100 each (see www.surplusunlimited.com
) that appears to be a direct copy of the Morse. I've had best luck getting support and parts from www.go2marine.com
You will need a clutch detent kit, neutral/start safety kit, and throttle hold kit for the main helm, plus 2 dual station kits to rig the controls in series, and yes, use the supreme cables.
I've heard that Yummie makes a dual-station control to mimic the features needed for a dualy setup but hear its almost $2K - yikes! Call 941-907-1000 for Technical Support on Morse controls.
Hope this helps
, send me private message if I can assist you
"Life's too short to own an ugly boat ..."