My mercury outboard will not start with the fuel line connected. If I pump the the fuel line ball I can see fuel squirting from the top of the carberator just below the electric choke solenoid. I tried to add carb cleaner through the fuel filter bowl but haven't had any luck. We assume that the float is stuck to the bottom of the bowl and is not shutting off the gas. I have no experience with outboards so my assumptions are just guess work. Anyone have any ideas? I'd really like to avoid taking the carb off.