@RailfanEthan I tried what you said but I don't know where to place it in the engine editing section. I just want to be surely sure right now so when I get home to edit I can do it right away. pls help.

Well, setting it to 0 can make it have glitches when the aircraft crashes (as in the engine could fall through the ground). Set it to something like 0.001 or similar. For weight, have you checked to see if the scales were applied? It's as simple as adding a part and removing it, because that's one way to do it.