Are you sure about 1-15?? I mean 31oz???

My Poulan weights 22.8oz for the engine alone (without prop adapter, muffler, carb, and mount). See my thread [link=http://www.rcuniverse.com/forum/m_3192059/anchors_3192059/mpage_1/key_/anchor/tm.htm#3192059]Step by step converting Poulan 25cc FL trimmer[/link]. Everything all together ready to go (less prop and nut) is 37.5oz - see the [link=http://www.rcuniverse.com/forum/fb.asp?m=3196558]final post in this thread[/link]

I wonder, what did you cut for over 10 oz weight saving?