I have to blame this one on me, not the PO. The original gasket was in good shape, so, rather than scrape it off and make another for it, I just wiped it down good with brake cleaner, put some silicone-type gasket maker on it (high temp Permatex Red), and put it back on...
I was careful to torque everything down in stages to the specs...what I didn't know was that the gasket had came off on the corner around one bolt hole. When I torqued it down, it cracked the corner off, but I didn't notice it until I filled it with oil prior to starting it up... <Grrrrrr!!>
Anyway, I did find a welding shop that has experience welding cast iron, and they're open in the morning tomorrow (Saturday) so maybe I can get it fixed. If they can't fix it then I did find a pan for a K301 12 hp off an LGT 125 at Joe's Outdoor. It looks to be the same... does anyone know if they'll fit???
Thanks for your reply,
I had good luck using Nickel rod in my Weldanpower in the repair of my garden tractor cast iron gearbox. had to weld back a ear that was busted clean off. Trick is if it is a big crack, you have to pre heat it, and then you let it cool slowly in a tub of sand, covered.
Repair held good.
Hope this helps.