This accessory will help you keep track of hours run so you will know when to do maintenance.  This digital hour meter will display hours used when the engine is shut down.  Also, know if your mower is running at full RP, when the engine is running it shows RPM.

Fits models H60B, C60BE, Pro60K, MR44B, MR44BC, MR44BE, MR55B, MR55BE, MR55BE, MR55KE, and MR55KEI