Does anyone know why my John Deere Zero Turn lawn mower will not run unless the choke is on?  It was working fine and then as soon as I lowered the mower deck and started the blades, the engine stopped.  I changed the oil filter but still it will not run.
It is a John Deere 737 ZTrek
	
		
			
		
		
	
			
			It is a John Deere 737 ZTrek