Boy this thing is stubborn.  I have hit this thing with all my might and the flywheel just won't budge.  I tried some WD-40 to see if it would penetrate and loosen things up but that hasn't worked.<div>
</div><div>What about holding the engine with the nut facing the table, and slamming the whole engine hard on the table?  Would the weight of the flywheel make it come loose?</div>