Bobert, it still runs, I didn't take the gas out this year, though I intended to. It stayed warm so long that I kept mowing, and then at intervals this winter there were things that needed knocking down. I use an additive to keep the gas from messing up the mower. But that's a good idea, I'll go through the steps in your list. Thanks! (I've sharpened axes and shovels and adzes and pulaskis, can I use a file and sharpen the mower blade in the same way?)

SRS