I have a 48'' Exmark TTHP with a 17 Kaw. The mower is on its fourth year and i have averaged about 50-65 weekly accounts (12-18K sq feet) with this it over the life of the mower. The engine is starting to wear out and loose a little power and becoming a pain with oil leaks and wiring problems, etc. Other than the engine the rest of the mower is working flawlessly (hydo, deck, etc...). I was just wondering if it would be better to replace the engine(doing labor myself hopefully) or would it be better to just replace the mower with one exactly like it because i have loved the mower. If i go with replacing the engine about how much will it cost(17 Kaw) ??