I am looking into a mower here in the midwest and wondering what would be a good deal to buy it for. I know there are a lot of threads that ask strictly about mowers, but this is a 36 exmark with the ECS controls hydro and only 60 hours and comes with a mulching deck and bagger. The kicker is that it has a 40 hour motor that is an 18 hp kohler, and the deal also comes with the original 15 hp kawa engine. Would that 15 fit onto an older style ransome/bobcat belt drive you think? Any thoughts would be appreciated.