Wd45 Spark Plugs

As long as those plugs are wet like yours, you'll never have to worry about burning a  piston. Before I rebuilt my 45 it used an amazing amount of oil. Someone before I got it had the pistons out and then put them in backwards. Where the wrist pins rubbed the cyl. walls there were two grooves about 1/16" deep by 1/8" wide. It smoked like a freight train and would foul a plug 30 min. I kept thinking about a temporary fix so I could finish my brush hogging. I finally thought of chain saw plugs because they're built to fire in oil. It never fowled a plug again. I used a Homelite XL 923 plug. It started good, ran good, and smoked more than it did before, just because it fired every lick. Since it's turned cold I've been thinking about putting them back in for starting easy. I don't run them in the summer now.

http://www.rockauto.com/en/moreinfo.php?pk=69518&cc=1324482&jsn=449&jsn=449&jsn=449

I don't know what you bought to "fix a leak" on the sidewall of a rear tractor tire, but that tire already has a tube in it. No such thing as a tubeless tractor tire on something of that age. I can't see your tires sidewall, but there is such a thing as a large patch called a "boot" to help keep dirt and things from migrating thru a porus sidewall and protect the inner tube. There are also "liners" to lay inside the tire to place a layer of stiff rubber between the tire carcass and the inner tube. Anyway, your inner tube has a leak, not the sidewall.