Jeff, not a whole lot to watch out for on any of the Cubs but here's a few thinkgs to check:
1. Take a look at the underside for signs of leaking Hy-Tran. If it does show signs of leaking, we can help you track down where the leak is coming from so this wouldn't be a deal killer just a price dropper.
2. More then likely the hydrostatic linkage will exhibit the normal wear causing "hydro creep" see the
FAQ entry #14. More then likely it'll have some hydro creep again, it should not be a deal killer.
3. The drive shaft coupler on the flywheel will likely be quite worn and in need of replacing. There should be a mesh cover over this area which is between the engine and the dash pedistal. When this gets worn badly it starts to hammer on the driveshaft eventually causing the spirol pin on the hydro pump end of the driveshaft to fail.
If this is in need of replacement I would highly recommend going with David Kirk's upgrade rather then the stock couple part:
Driveshaft coupler mod part numbers:
748-3001 Arm, Coupling
722-3000 Disc
703-0204 Flange, Drive Shaft
715-3000 1/4" x 1 3/8" Spirol pin
David K., was any drilling required to substitute these parts for the original coupler?