2016 Troy Built TB-360 with Briggs and Stratton 190cc Model 121S02-0068-F1 kick back.

Customer hit something big and hard with this mower. The fly wheel key was sheared I pulled the fly wheel and replaced the key. I checked the crankshaft run out on the blade side it is .018. I have spark, air and fuel but every time I try to start this mower it's still tries to yank the cord out of my hand severely I'm at a loss I cannot figure out what's wrong! I pulled the valve cover and rolled the engine over by hand to check valve timing roughly it seems to be close I cannot find a manual for this engine so I went with my gut on the valve timing. I do not have the blade and adapter/pulley installed as it got pretty well destroyed on the impact. I do not want to order the blade and blade adapter/pulley if the motor is a goner I'm thinking it's something simple that I'm overlooking I hope some of the talented folks on here can steer me in the right direction.
Thanks in advance for any input.