I have a sb200 snow blower that worked great last year but now I am having problems. The snow blower will not spin in reverse and the chute will only turn in one direction. I spent 100.00 dollars on a repair manual and there is nothing there to help. My question is that I believe the machine makes the fluid flow in reverse to turn the auger backwards and the chute the opposite way. What in the macnine does that, or is it in the Module they put out in the elements. Any help would be really appreciated