The BME 50 weighs 3lb.s 1/2 oz. the muffler the gasket and screws 4 oz.s the C and H Ing. 3.8 oz.s the plug .9 oz. for a total of 3 lb.s 9.2 oz.s. You have to have a motor mount too I use a Hanger 9 mount that weighs7.1 oz.s for a total of 4 lb.s .3 oz.s. Hope this helps.