BS vanguard engine compression release?

I bought a lawn tractor with a 17HP Briggs single cylinder vanguard engine,it stops cranking when it reaches TDC, if you help it a little bit with your hand it starts right up. Has any one out there had a similar thing happen to you? How did you fix it?
 
Check for damaged or bent pushrods, then set the vales to correct "spec".

You should be able to enter the model # of the engine at the Briggs official website and find exact instructions.

The gap is SMALL, and typically the piston needs to be a measured distance (through the spark plughole) past TDC.
 
Set both valves at .004 clearance and that should solve the problem you are encountering
 

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