I need the belt routing for a john deere sabre 1646

Hi,
I will post a picture of the 46" deck. You may want to get a manual. May not be the exact one, but try OwnerIQ: Product user manuals, help, forums tips and tutorials. and pick Lawn & Garden, then Scotts (they are Deeres, too), Lawn Mower and there are a couple of models to choose from. Both will link you to a site on Deere that is unpublished otherwise.
Peace,
Clarke