Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! How old are the batteries, have you ran a voltage test with voltmeter while driving, using long leads to connect voltmeter to the battery pack? Motor can have problem, but eliminate the batteries first. 36 volt cart .. battery pack should not drop but a small amount when driving.
try voltmeter test under load.