If you're unsure whether your carburetor choke is open or closed, there are a few things you can check. First, take a look at the air filter. If it's clean, that's a good sign that the choke is open. Next, start the engine and let it idle for a minute or two. If it sounds smooth and even, that's another indication that the choke is open. Finally, feel the exhaust pipe. If it's hot to the touch, that means the engine is running lean and the choke is likely closed.