Deerhunter, the motor seems to lean out around idle. Check your plumbing to see if have a very small air leak. Also check your primer bulb, rev your engine and carefully look at your primer bulb and check for very small streaming of bubbles, kind of like in a champaign glass. Bring the engine to the lowest rpm possible and then rev it up quickly, repeat this a few times while keeping an close eye on the primer bulb, see if notice any bubbles.