Well, I went out after spending a few hours plowing the driveway, put a bar and chain on the 346xp and fired it up. Was doing the same thing, so I popped the top cover off so I could see the adjustment screws.
It's defiantly not running right, but it will run with the top cover off, but as soon as I put it back on, it wants to bog and die. (I had the top cover off earlier when I said I had it running after carb ajustment)
I also tried messing with the high jet, and found that I could back it all the way out and it doesn't run any different, doesnt want to rev and bogs down. The only place that was different was all the way in tight, and it wants to die altogether right there.
Starting to think maybe its time for a carb rebuild, But I may just replace the carb and do away with the primer bulb.