I took the RYOBI to the P.O. this AM, and here are the specs. Engine with the following. Cup mount, Muffler (subject to change), prop hub and backing washers with nut, Electronic ignition (less battery). Three pounds six ounces. I think I could shave at least 2 ounces off if I replace the cup mount with a flat plate. I currently have a higher modified engine in progress, and I will try and keep you informed as I go along. On the way home, I stopped at my favorite junk dealer, and now I have three more weedies, and three Homelite Chainsaws. Chainsaws are from 20 cc to 50cc. FLATHEAD 4