I just bought this machine a few days ago. It has a small oil leak. It sat for a few years. When I first started it, it had low oil pressure. I added oil and left the barn I found it in. When I was about 10 miles away the gauge went all the way low. I kept trucking. Made it home. Just started tinkering with it today. Started it again and the oil pressue was in the normal range. Took a trip around the farm and it went low again. I'm not a mechanic. Maybe should not have bought a toy but I'm sticking with it. What do ya think. The thermostat gauge is not working either. I do know that It is pumping water. Looks like the sensor is not there anymore. I think i found the oil sensor behind the carb and it looks like the wire is intact.