GYTR Standard Hour Meter A must have for logging time on your Yamaha engine. Hour meter function only (no service alerting function). Installs in minutes and is mounted in the engine compartment. Fits all Yamaha off-road / ATV models, Rhino 700 / 660 / 450, and all Yamaha Boats and WaveRunners. GYTR&reg; P/N: ENG-HOURS-00-00.