[img]/forums/images/icons/tongue.gif[/img] Gen sets can rack up an incredible number of hours. One of our pumps had about an eight-foot circle around it pretty well oiled from blow-by and oil leakage. Those units ran just about continuously from April to late September. Everything in those engines is so overbuilt that there seems to be very little wear from stress. We never DID overhaul one; they became obsolete before they wore out. [img]/forums/images/icons/crazy.gif[/img]