Changing a gas engine to glow fuel requires different carb jets, a glow plug with adapter, and removal of the spark-creating mechanism (coil, etc.), at least. There may be more. Conversion kits to do this are available, but frankly, I don't see why you would want to. Some of the advantages of gas engines are cheap fuel, super reliability, and user friendliness. You may lose all of this when you change to glow.

Dr.1