I just bought a 1999 Maxum 2400 SCR with a 5.0L Mercruiser. (Wife loves loves the upgrade from a W/A and head!)
With two people the boat runs WOT at 4100RPM at 36MPH with a 14.5X17P 3-blade Michigan AL prop. (prop rebuilt recently.)
With 6 people and 35 gal fuel, the boat will not make it past...