I had problems with my Outboard after eight years of not having a single problem. I seemed to b having the same problem a lot of others are having with the gas line breaking down from new gasoline, so I purchased a new hose and bulb and replaced this first. When I pumped the new bulb I could hear the gas flushing thru the carburetor and realized the gas was going thru the carburetor and filled the engine with gas. I had to pull the plugs and turn it over to get the gas out of the cylinders. I thoroughly cleaned the carburetor and reinstalled. I am thinking the fuel pump diaphragm ruptured and gas pressure from the bulb is forcing the gas into the engine cylinders. I checked the float and needle seat looks good. Could a valve be stuck open?
