I went out to cut some firewood yesterday. 346 was running way to rich. It was a bit warmer out than it has been. I made a few cuts to see if it would warm up and straighten out. No. Ran back to shop and got a small screwdriver and turned H as far as I could with the limiter on. Still rich. I noticed the primer bulb had a vortex of bubbly gas swirling around. Is that normal? Any thoughts on why it would suddenly be rich? 3 month old saw. I have run about 4 gallons through it. Air cleaner is fine. Non-cat.