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Thank you Sir; good to know. We don't get a lot of dirty ice in Utah, but they do in Wyoming where I may make a couple of trips each season. Note to self - let somebody else drill your holes in Wyoming.
Similar thing has been happening to me with my new 8" on the lithium unit. I can live with it as long as it doesn't get worse.
I literally just tried my brand new 6" lite flite this weekend with a Milwaukee 2804. I was super pumped, but ran into issues when it basically would just drill 2" or so and then spin (not digging anymore) on the very first hole. I would need to apply pressure at the exact moment I could feel it starting to quit digging and then it would plow through the rest of the ice. Verified it was on "drill" and "1". I have a call into customer service. Anyone else run into this issue?
This is just a guess, but could it be that the first 2" are white ice where the blades dig with no pressure? Then when you break through into harder clear ice it needs a little more pressure to keep drilling? I noticed it with my Jiffy Torch this weekend. It would drill a few inches then seem to break through and spin a revolution or two before grabbing the new layer. I didn't really have to put more pressure on it but maybe with different style blades you might have to.
Check the bolts on the auger blade. Your blade pitch could be off.