I bought a 1715 for the engine with a shot transaxle. Picked up a 16?? with a bad transaxle, and my main mower that I bought new in 92 (1330) pucked out last year, but luckily I had a doner for it.
If you like it, to bad you couldn't put it up for awhile and run an add looking for a complete tractor for parts, they aren't very expensive in my neck of the woods.
Good luck