The hour meter clocks up 1.2hrs. for every actual hour run.I know time flies when you're having fun but this is ridiculous! Seriously though I know that tach based meters show less hrs. than electrics due to varying engine rpm. For instance on a Case 580 at work with both meters by the time the tach hr. meter read 4000hrs. the electric read well over 5000hrs. and no it wasn't from the switch being left on overnite as the electric one only runs when it senses oil pressure same as on the mower. Never checked the electric meters on the equipment for accuracy though. Anyone else out there noticed this?