Report "I have a 46 inch 21hp huskee riding lawn mower. I bought this and have fixed it up and runs now. But my question is what size is the drive belt that goes from the engine to the drive. It has a double pulley at the gear shift. I have the belt that goes from gear shift to transmission but need either part # or size that goes from engine to gear shift. I had a 52 inch on and looked like it fit but she. I started it and tried to drive it didn't move. It has a idler pulley by gear shift so there are 3 total pulleys for this belt"