You will probably need someone to help you, it takes 2 hands to wrap the cord and another person to hold the "internals" of the pull start, to stop the spring pulling the cord back in and undoing all you hard work. Bear in mind that you do NOT need to remove the spring etc, just remove the entire pullstart assembly from the engine in one piece (use a knife or something similar to get both the "inner" part and the pullstart housing in one go). Once you get the hang of doing this it seems incredibly easy.