The Genuine Tohatsu Marine Part is a Tachometer Kit (TOCS) with the part number 3KY-72638-0. This kit is specifically designed for Tohatsu outboard motors and is used to measure and display the engine's RPM (revolutions per minute). The tachometer is an essential instrument for monitoring the engine's performance and ensuring optimal operation. With this Genuine Tohatsu Marine Part, boat owners can accurately track the engine's RPM and make necessary adjustments for smooth and efficient operation on the water.