Mercury - SC1000 Tiller Tachometer Kit 7000 RPM Surface-Mount Gauge 7 ft CANP Harness 98-8M0095036. Overview. The Mercury SC1000 Tiller Tachometer Kit (98-8M0095036) is a complete, ready-to-install RPM gauge setup made specifically for tiller-steer boats. It includes a 7000 RPM SC1000 tachometer (black face, glass lens) and a matching black bezel (8590741) pre-mounted in a surface-mount gauge holder, along with a 7-foot CANP terminated harness for easy connection. Built for SmartCraft-equipped e