Ralphbf mine is 1lb 15 oz complete with muffler, engine mount and propeller.

Richard: I took out about 1/16" from the top on the exhaust side and also about 1/16 from the bottom on the admision side; keep measuring with the timing wheel untill satisfied with your desired timing duration increase.

Captin: same here once you set your engine they are very reliable and stable using the same fuel proportions all the time, I am using the new Hobby People's 4 stroke and Big Bore engines glow plug (cheaper $5.50 and runs very good) dont need an onboard system and it idles very low but I like to keep it a little bit on the high side.