I've had a constant problem since inheriting this 2005 Ariens 1534. Once the engine starts, it runs fine and I can shut it off and restart it easily as long as the engine is still hot or warm. But when I first take it out of the shed, I can crank the starter forever and it will never fire. If I spray some gas directly into the carb (after removing the air filter), it starts right away. My first suspect is the vacuum fuel pump, but I don't know how to test it and don't want to buy one without knowing that's the problem. I'm thinking that there isn't enough suction from the starter motor, but once the engine actually starts, then it's fine. Does this sound right? Or could it be something with the carb's float bowl (does it even have one)?