i'm looking to replace the old gas mercruiser 230's in my bertram 28. They're carburated so some new injected gas engines would obviously be more efficient.I'm just wondering, is it worth the extra cost to drop in diesels. I know they'll last a lot longer and be better on fuel, but theyre quite a bit more expensive. Would fuel savings be enough to offset greater up front costs of diesels? I'm a seasonal boater, may to october, averaging about 250hrs a season. Any input would be great!