I have followed the instructions to the T. I have a brand new saito fg- 57t that I have yet to break in. It does not state whether the gas tank should be in line with carb or above. I have tried it both ways.. The problem I am having is it only runs long enough to burn the fuel that I just choked into the carb. Following the steps in my manual book which is 6 1/2 x 5 inches with the cover saying SAITO twin-cylinder gasoline four-stroke engine.
What size prop are you going to run on this engine on your XCub? Where you using 15:1 oil ratio for this break-in? How much gas did you run through it for break-in?