carb loading up

Sorry to hyjack your thread, but this advancing the timing to , like, 20* doesn't work for me. I've tried this, and I can't get the engine to re-fire after shutting it off with 20*. It just hits against the starter if I go past ~13*.

Also, if it's at 20*, and I rev it up in neutral, the timing goes way past 50*, and the engine starts shaking. Whats with that?

What am I missing here?