I would simply run it out of gas. Gas is your enemy. It doesn't age well. Gasoline contains alcohol. Alcohol absorbs water. When gas evaporates, whats left is water. Water creates problems, mainly rust. Rust screws up the carb.....etc.............
Run it dry. Leave it be. Go on with your life.
"Thanks dad, you gave me courage, wisdom, honesty and strength. I will truly miss you, my friend."