overheating

Hello everyone! I'm a bit stumped. Hoping someone can help with opinions as to what might be wrong with my saw, a 395xp. Running a 3-ft bar with skip tooth milling chain. I was milling a long slab (23-ft),and towards the end, the saw leaned out, and ran out of fuel. OK, that happens with such...

I recently aquired a 038av mag. I was putting it through its paces on some soft cotton wood today. After about 3 or 4 passes through a 18 inch log, the saw started getting very hot and blowing a little white smoke. Virtually brand new bar and chain and is throwing plenty of oil off the bar...