You a train engineer? We have a member (Grant) who rode the rails for many years.
Decks are always a wild card till you take the cover off and/or flip them over for a look-see but I don't see anything on that 317 that can't be refurbished. If it still has the Series 1 Kohler and it runs decent then you likely have a good engine. If it wasn't it would have busted a gut by now. That's the conventional wisdom anyway. I sometimes wonder if the fatal flaw Series 1 lore is similar to the overheating Honda twin issue. It may have happened in a few cases but not nearly often enough to be a reason to avoid them.
Decks are always a wild card till you take the cover off and/or flip them over for a look-see but I don't see anything on that 317 that can't be refurbished. If it still has the Series 1 Kohler and it runs decent then you likely have a good engine. If it wasn't it would have busted a gut by now. That's the conventional wisdom anyway. I sometimes wonder if the fatal flaw Series 1 lore is similar to the overheating Honda twin issue. It may have happened in a few cases but not nearly often enough to be a reason to avoid them.