Hard starting when cold

Try this. Before even turning the key,...take the air filter housing off, hold the choke plate open, look down the carb and use the throttle linkage and give it a few pumps to see if it's squirting fuel. If not, there might be a accelerator pump/float issue. After that,.crank the motor over a few good times but don't give it any gas,.then do the test over again to see if it's squirting then. If so the fuel over night might be draining back. Maybe a needle and seat problem. Just a thought.