Eco-Fly introduced their Smart Deisel engine at a fly-in in Florida this week. It is converted from the Mercedes Benz diesel installed in Smart Cars. The engine pumps out about 80 horsepower, but weights (89 kilograms installed) considerably more than competitive Rotax engines (e.g. Rotax 912 weights about 64 kg.) How does this installed weight compare with other (80 hp.) gasoline engines? Specifically, VW conversions, Rotax and Continentals likely to be installed in a Thatcher CX-5? Is the Eco-Fly Smart engine too heavy for a CX-5? It is important that we compare "installed weights" with "installed weights" to get an honest comparison. Ideally we would compare "firewall forward" weights that include: spinners, propellers, cowlings complete induction systems, complete exhaust systems, complete ignition systems, starters, and engine mounts. AVWeb published quick video on www.youtube.com.