Anyone know for sure if you can remove the flywheel from an Evo .46 without messing up the drive washer? Or am I stuck with having to buy a new drive?

Comes off no problem. Yes I have done it.
Tim

Yeah, it's just a press fit.

Do I need to use heat or not?

I just rested it across the jaws of a vice, prop drive facing down between them, and used a socket the same size as the drive. A few taps w/ a plastic mallet and it was outa there...No heat req.