I have a 20.5 hp yardmachine riding mower with a 46" mower deck. I am trying to change the drive belt and can't seem to figure out the routing pattern on how it goes on. The owners manual doesn't have it in it and I've even e-mailed yardmachine themselves and they won't help unless I take to a dealer. I bought the belt off them so I know it's the right one. I put the belt on but it seems to still be to loose. I'm not sure if it's the routing of the belt or the tension pulley.

Which belt did you replace, there are 3. The deck belt layout is usually a decal in the deck.