Starts dies rebuilt carb, new plug, new gas filter.

The float in your carburetor is stuck, not allowing the needle valve to close in the seat and stop fuel flow. Gas is bypassing the needle, and filling the crankcase. Rebuild Carb, Drain crankcase oil, and replace oil filter. Fill with fresh oil, and problem is solved.

You need three things to make any gas engine run, in this order double check make sure you have proper timing set, spark and fuel. Could be bad gas or a bad ground from motor to frame.

Sounds like it might be starved for either air or fuel. Have you made sure there is full gas flow from the tank to the carb? Also recheck the needle valve regulating gas flow into the carb. May be that a speck of trash is partially plugging that flow to carb. Should have in-line fuel filter (add on) in addition to the bowl 'filter

Carb. needs to be rebuilt. If your choking the engine it to keep the alive and you've cleaned and replaced everything else, I would recommend carb. overhaul.

Sounds like the carb is varnished up and needs to be rebuilt. They make rebuild kits depending on the carb number and you can rebuild it.

If you rebuilt the carb did you turn any of the screws on the carb while cleaning or take out, you might have just the low idle screw closed a little to much open half turn and see what happens. If you look at the carb where needle screws are located on the side,if you have two screws it will be stamped with an " L " and?or an " H " next to each screw. If you only have one screw then turn that one, to left to get more fuel. Good Luck...

take the carby in to have it assembled correctly
the positioning of the gasket on the right side of the diaphragm is critical

first check for spark, if you have spark gap plug at .030. turn mixture screws completelin give a short squirt of carb cleaner directly into throat of carb and try to start if unit starts then dies ,carb needs to be rebuilt and also change fuel filter in the gastank. gas mixture 40:1

Spray starting fluid into the air box if it starts and dies out there is a fuel delivery problem if the mower has a petcock fuel shut of valve disconnect the fuel line after the petcock and hold a container under the hose turn on the valve to ensure gas flow to carb if there is no petcock valve I would still check the line to carb make sure gas flows through the hose to carb.

metal or plasic float?