bigdaddyinacaddy
Obsessed
I had this same problem. Except mine wouldn't spin at all. Replaced the starter twice. Turned out to be the connection between the passenger side battery and the cable that goes to the starter. This is how I figured it out. Get a multimeter and put it on the power wire at the starter. Find a good ground. Should read exactly what the battery reads. Now get someone to try and crank the motor while you are doing this. If it drops below 9-10v you have a bad battery connection. Mine dropped to like .2v so that's how I knew. Good luck man.