Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Can you loosen the exhaust at the head , to see if the exhaust may be plugged? If the exhaust is plugged, the fule will not enter the cylinder, as the exhaust can not get out.
Do you get a good solid fuel flow from the tank to the carburetor? I see it has fuel shutoff in the tank. You are right, the exhaust is not a problem, if it runs when you put fuel in the carb. Has to be a lack of fuel.
I keep looking for a fuel regulator, or fuel pump, but It does not show one. Seems like you are getting too much fuel to carb. But maybe the float and needle valve is not controlling the fuel flow. But you have a new carburetor!
This is new carburetor? Seems like it is not controlling the flow into the float bowl. I would check the needle and seat and the float, as they are what has to keep the flow from over running the bowl and flooding the cylinder.