What is the model number?
Here is a diagram
No, this is not the unit. my mtd has a vertical shaft motor. the drive pulley assembly is under a shroud that the motor sits on top of. I think the model number is XXXXX or 217-412-000
I did some digging through my old mtd microfiche and found a tiller with a vertical shaft engine. It was back in the 1970's. I found a model number 217-200a. I looked for a diagram on the net, but was unable to find one so I will try to walk you through the diagram I have. I have no way to get it from microfiche to computer or I would copy it. OK, The first thing you need to determine is which set of pulleys is for reverse and forward. Top or bottom. The diagram I am looking at does not really tell ne whether I am looking at it from above the tiller or below. The forward belt will go around the engine pulley and will then go between the idler and guide and then around the gear case pulley and then a straight shot back to the engine pulley with the other side of the belt. The reverse belt will go from the pulley on the reverse bracket straight to the gearcase around the gearcase pulley and then back to the engine pulley. The backside of the reverse belt will be what makes contact with the pulley so this should be a flat idler with no v in it. Clear as mud? Let me know if you need anything else. I used my digital camera and took a picture off of the microfiche reader. The picture is not the best, XXXXX XXXXX may help you understand it. If this does not look like it let me know.
thats the picture I need... you are awesome! We can see the layout, but we can't read anything. I don't know the length of belts, does it say that on it? I don't know if there is any twisting of the belts necessary. Can you write what it says on the microfeish? or make a cope of it and scan that? Let me know.. if you can do this I will leave awesome feedback and accept thanks