S/n ?? You list two s/n's, 13897 and 061107. Why do you need s/n?
Link the Google search above, and pic the OM manual listed. You need to use the product number,(###) ###-####as your model.
!! Sorry, I didn't downoad it! I thought it was full manual. Let me try again!
From what I find, your McCullough will be this mower! See link above.
Shows to have same operating manual.?
I just go by what the numbers show, the Briggs single cylinder is same from from 12 horse power to 22 hp. all same diminison. You wanted operators manual. As for as basic tractor and deck, it should be same. McCollugh does not make mower, but is a re branded MTD. which makes both the McCollugh and the Poland.