Rob,
Larry and Bill pretty much covered it.
One thing that I noticed is that the tank is a little higher than the venturi, so when the tank is full, fuel may siphon into the engine. If that is the case, your fighting a flooded engine from the start.
Here is what I would try. Disconnect the fuel line from the engine, pull the prop through by hand until the piston comes up and blocks the exhaust ports, then squirt a couple drops of fuel against the side of the piston.
Connect the glow driver, and flip the prop over smartly. It should start, and run out the prime. If it only pops a couple times, and then won't fire again, increase the amount of prime slightly (again with the piston up), and try again. When you can get it to start, and run out the prime, you will have an idea of how much prime it likes.
Now, put only a half ounce or so of fuel into the tank, and reconnect the fuel line to the venturi. You only want enough fuel to cover the pickup tube inside the tank.
Now cover the venturi with your finger to choke the engine, and pull it over slowly until the fuel is drawn to the spray bar, and no air shows in the fuel line.
Now put one drop of fuel in the venturi, and prime against the side of the piston as before. Connect the glow driver, and flip smartly. It should run out the prime, and continue to run. If it's too rich, it will slow down after the initial prime is exhausted, and possibly sputter and die. If it's too lean it will run out the prime, and immediately die.
So, open the needle a couple clicks if lean, or close it a couple clicks if rich.
Bill