RE: New Pattern engine gasoline
the total weight of engine, ignition and ign. battery probably will be around: 2.4lb + 3oz + 3oz = 2.775 lb (1260 grams). YS160DZ weights 2.05 lb (930 grams). The difference is 11oz (330 grams). Thi extra weight probably can be partially offset by using a smaller tanks, to satisfy the pattern airplane weight limit.
Surely, it can be a killer to the YS.