Having some trouble getting the control levers to work. Took apart the control box, found the problem, but the box tipped over on the bench. Is there a manual or a diagram out there to show me how to put this back together properly? Also, I would like to know for sure which lever does what. There is a larger lever on the left and a smaller lever on the right....one for shifting and one for throttle. Which is which? Any info will be very helpful!! Thank you