Pinging on acceleration.

Dude, that's about 30°BTDC, that would be about the total power timing You'd shoot for....initial°+mechanical adv.°. Check the advance mechanism by popping off the cap & twisting the rotor back & forth against the advance springs, if it's stuck/frozen, it's like running a dizzy locked-out.....not for You Young Jedi....
It's not that high. Look closely at the last number on the timing tab. It's 10 degrees BTDC. So where the arrow is represents about 12 degrees.