I have a toro 20039 personal pace rough running and a whooping sound, I found the flywheel key sheared(fixed), A hole in the head gasket (fixed), cleaned carb, starts but stalls and is hard starting very frustrating, come to find out the wrong primer bulb was replaced with a solid bulb and not the correct one with a hole in it p/n 694395 used on non adjustable carbs, it now starts on the first pull ?