1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 344Get this manual
Parallel Routed Steering Cables and Attaching Kit Installation (Both Steering Cables Routed Together Down Starboard Side of Boat)
WARNING
Before using engine after installation of cables, check to see that boat will turn right when steering wheel is turned right and that boat will turn left when wheel is turned leftDo this check at all tilt angles and thru full range of turn angles
Super Ride-Guide Steering Kit Installation
IMPORTANT: It may be necessary to install steering cable into tilt tube of starboard engine before mounting engineBoth gear racks or rotary steering heads must be installed so that both steering cables will be routed together on the same side of the boat and will push-and-pull together1Install Super Ride-Guide Steering Kit in accordance with instructions included with Super RideGuide Kit2Make sure that both gear racks or rotary steering heads are installed so that both steering cables are routed together and will push-and-pull together (Figure 1)