[Thumper]

Rob, Not sure what won't kick over means. I assume that you mean that the starter turns over the engine, but it is not firing up.

I agree that fuel may not be flowing or you may not be getting a spark (as mentioned above). but...

Could be low compression if the valves aren't closing. Previous owner may have never checked them. It would turn over easily with the starter. So check valve clearance. A simple rocker arm wiggle test at TDC on compression stroke will confirm this (should be a slight gap detectable). If they are tight at TDC, they absolutely need adjustment. Excessive wiggle, too loose and opening late.