If you do not like the starter box you are going to hate a pull starter! I use a starter box on both mine. Do you prime the engine before trying to start it when it is cold of after setting for a while or after running out of fuel? Other then factory settings which is just a place to start with there is no way to say what yours will end up being. Weather, altitude and so will affect tune. Many times it will change during the day do to weather changes including but not limited to temperature.

Best thing to do is set to factoring settings and retune.