SeaStar Dual Rack SSC135 Back Mount Steering Cable by DometicSeaStar dual rack and pinion steering cables are specifically engineered for high-performance boaters wanting No Feedback technology. SeaStar has combined its patented No FeedBack technology with the incredible precision and control of a dual cable rack and pinion system. This replacement dual rack and pinion steering cable generally installs with no dash alteration and will provide years of performance for boats equipped with a non-power assisted outboard.Twin rack cables fit SH5210P, SH5230P, SH91610P, and SH91630P helms.How to Measure Steering Cables "Measure Twice. Order Once."Replacement of Existing Cable: If possible, find the part number stamped on the plastic jacket of the old cable. If you removed the old cable, measure for the replacement cable as follows:For Rack Steering Cable Replacement, Measure Existing Cable as follows: Measure plastic cable jacket ("Y" dimension shown in above drawing) in inches, add 30a ^2, and round up to next foot. Order that length cable.New Installation: Measure cable routing path from wheel center line to engine connection, as follows: A = Center line of wheel to gunwale (or deck, if routed downward), B = Dash to transom, C = Gunwale to centerline of cable connection at centered tiller.For Cable Installations through the Engine Tilt Tube: Add A, B & C + 6a ^2, then round up to the next foot. Order that length cable.For Cables Mounted to Transom, Splashwell or Stringer: Add A, B & C, then subtract 6a ^2 and round up to the next foot. Order that length cable.TYPICAL SINGLE STATION ROUTINGA single-cable, starboard drive push-pull mechanical cable system is shown in this diagram. If your mechanical system is different than the one depicted and/or you have any questions about mechanical steering after reviewing this guide, please contact Dometic (Mechanical) Technical Service at (610)-495-7011 or www.Dometic.comCable routings (such as those found on pontoon boats) may vary from this drawing. Confirm length by laying a garden hose or similar object) along cable path and measure run from wheel to engine connection point.