Seabees,
Thanks to today's technology I turned my small lap top upside down

and notice that you may have several of the heat shields missing. Or maybe this was a picture where you had them removed? So that could be causing some heat going up to the fuel tank area. Maybe you could find another parts tractor or get tins from someone on here to reduce the heat problem.
Thanks for posting and good luck with your tractor, it looks to be a good one.
Regards,
Chris
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Casbohm Maple and Honey
www.mapleandhoney.com
Cubs: 147
R and the "train", 127 elec lift, 127, 125, 106, 102, 100, 86, 73, Brinly plow, Snow thrower, 2 Rototillers, several mower decks and several snow plows, #1 cart, Grandkids barrel cart.