On Tue, 21 Nov 2017 12:31:59 -0800 (PST), wrote:

the timing could also be off..

did you hit something with the blade?

do you know about the "shear key"

mark

.... look for a frayed / cracked plug wire near the cowling.

Spark grounding to the engine block (what ever you call it)?

The shear key only needs a little twist in it to throw timing off. It
may look just fine, but a tiny twist and it needs to be replaced. It
does not have to be broken in half. And. Get the correct size shear
key.