Just rebuilt a CA. Everything is new, runs great except for one thing, I have to pull it to start it. New Battery, Starter has been checked out and is in great shape, but when I try to start it by pulling the lever back the motor only grunts slightly not even a full turn. I replaced the ground and positive cable I have it hooked up correctly with positive ground. If I pull it she fires right up but does not have enough ummph to turn over otherwise. Any thoughts???