Outside temps and perhaps other conditions can dictate whether you need no choke, partial choke, full choke. However, the starter should spin for a very long time with a fully charged, properly working battery. I wouldn't spin the starter for more than 10-12 seconds. As stated, your valve settings could be so far off that turning the engine over could range from a little difficult to difficult enough to not turn over at all resulting perhaps in a click or two from the starter on no sound at all.