1991 Carrera Eclipse 20' all stock Hardin 454/715 holley/bassett twistys, Berkeley 12JG-a /a impeller/ standard nozzel
I picked the boat up a few months ago, ran 53 MPH@ 3900RPM with lots of cavitation on take off. Secondary shaft was corroded shut. Rebuilt the carb and ran 57.9@4100RPM but still had the cavitation with 3 people and a good size full ice chest. Sharpened up the impeller and installed an older manual diverter and ran fastest at 1 notch above center on the diverter @ 57.8@4150RPM, no cavitation but it started to porpoise a little with 2 people in the boat and no other extra weight.
Whats next as far far a speeding this thing up a little? From what I can gather there is something wrong. Would setting the floats to low cause a lean enough condition to keep this setup from running 65? Everyone says this is a fairly quick hull and should run 65+ out of the box.
Any worthwhile ideas are appreciated.