Are you serious? Definitely do not try to get the engine started in this situation. If you do get it to fire, you will destroy your lower-end bearings. Fuel has filled your cylinder and crankcase and caused a hydro lock. Shut off fuel flow. Drain crankcase and replace filter. Find out why the carburetor needle can't hold back the fuel pressure. And put new oil in it.

Well, won't start??? don't tell us much??? How about does it have spark??? You need to get pass this one before going on???? does it have compression??? need to get pass this one next (push rods in righ hole and adjusted so the valves are closing, or not opening the valve enough or at the right time with too much lash?? Is it getting gas??? does it backfire when it turns over fast enough to start??? Are the spark plugs wet with gas??? Have you Primed it with carb. cleaner either by removing the plugs or by squirting it down the carb. and trying to start it. Does it do anything????? My best guess would be a timing issue or a compression issue once you pass spark?

OPreacher, please post the model number and the type number from the engine itself. We need those to get a proper and specific ID on the engine.

I have CHecked the valves and even pulled the head and the valves are set correctly and they look really good. I also rebuilt the carb and it still overflows when it is shut down. Float is good. IT idles good and still when I increase the throttle it starts to pop back thru the carb.THe plug is black so it is running rich. I was told to get a new carb? I know sometimes they cannont be rebuilt. I just want to make sure that is the problem before I dish out over 100 dollars for one. Any thaought would be greatly appreciated. THanks