Mike,
I am not a expert on these have only owned 4 of them. All of them have had this shroud around the fan. I would assume it is a guard as much as anything.
Yea its all stock. Just not Cub Yellow

Thanks for taking a look at my project. Not sure how you copied out one picture? Nice move!
PS I did not touch the 147 today. Lots of seat time on the 127 and the 86 too.
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.