Nice pics DKFRY, ty! Yup, round chainsaw file, gain a 1/16" and break out the grinder.
Jackpine, the two holes u r referring to: inboard one is for a blade protector that bolts on for travel, the previous owner made his own, using a wingnut to spin it on/off. The outboard hole has a bolt that adjusts up and down with washers for proper blade cut angle? I have tried removing washers and it cut choppy, so I replaced them. I think as your blade wears, you are supposed to remove them so you retain the proper cut.
I checked out website (may buy a lazer 7" hand auger for a back-up and first/early ice) proper link is >
www.drockicecenter.com All the parts are for 1980 machine and newer- my machine is a 1977. Eskimo does`nt support it`s older augers, stupid move , they last forever. They are leaving a blade/parts market untapped.
I was giving the auger by a relative whos back will no longer let him step on the ice. He rarely used it, and it had sat for years. I put 100+ holes on it last season and it ran like a charm- cut did slow down, and gas tank fell off once(bracket broke=radiator clamp), but mechanically ,she`s a winner. I`m an OLDSKOOLFOOL!