Hi! By default we have engine (1,2) fuel control switch open. How to do them cut is it posible?

You want them to be turned off when you start the flight? Then turn them off, then save the game and while saving it mark "Make this the default flight." checkbox on the bottom of the save dialog.

Now, every time you start free flight aircraft will be configured the same way as it is in that save file. If you are trying to make "Cold and Dark" start there are videos on how to do that.