At my request not too, while I was gone, my wife mowed part of my pasture. She did not check debris on cooling fan. As near as I can figure the engine was run for at least an hour or more with no cooling at 80 degree day. Engine finally quit on her, I started it after cool down. Found out it got so hot it melted all plastic parts contacting the oil, like dip-stick and bottom of filler tube, but the engine still ran pretty good. Am replacing the engine. I am AMAZED the engine STILL runs. You may be interested in teardown to see type of damage with such high operating temps. I figure maybe in the 400 to 500 degree range. Engine has ran since new with Opti-4 oil for 157 hours.
