Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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It sounds like the float valve is not sealing properly in order to shut off the fuel flow coming into the carburetor. Did you replace the float valve and seat?
The float valve is normally attached to the float so when you pulled the old float out you may have lost the valve or needle. I would go back and check to make sure that the float valve is still there it is inserted into a hole in the body of the carburetor along the same side as the pin that holds the float in.
Yes, if you can't find the float valve, then you would need a rebuild kit in order to fix the leaking problem.
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