I just bought a Sport Craft 252 Inboard and it has a 5.7 250 HP, SN 0L392532 Mercruiser and have no info with boat. I bought a Clymer Inboard /Transmission Repair Book (which I don't like, any better manual suggestions would be appreciated) but they list the engines in MIE 233 260 etc... Which one is mine? I'm thinking the 260 since that's the closest HP? Thanks, JEC