I recently bought a mint condition 1987 Eliminator 20.5 ft jet boat. It has a 454 indmar engine with msd ignition. I believe it is the ho model. It has the Dominanator mb12s jet pump. I'm only seeing 50mph, and thought I should be seeing much more. If you put it to the floor from a idle within 1/2 second it's at 5000 rpm and stays there. To me it seems like it should have to work a bit to get to wot, it's almost like it's geared down. Any ideas? It doesn't sound like its cavitating but I work on jet skis for a living, so am comparing it to how those cavitate.
Thanks