jonsered 2150 issue problem crankcase

My friend's jonsered 2150 took a hit from a small log in the oil tank and split open half of the crankase .It's not cracked,just split open,like a magnesium crankcase. 1. Is this a known issue of the 2150s? 2. Can I use epoxy to put it back together ? 3. If not,do you recommend using a...