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  1. S

    5.0 GL no power above 2000rpms

    Please help...I have a 2004 5.0 GL Volvo penta, runs great in the driveway turns 5000rpm, under load only 2000, can’t plane very frustrating. Compression check is good, new plugs, wires, cap rotor, fuel pressure 8 psi, rebuilt carb, moved up to larger jets, 5.5 power valve 28 squirter. Worked...
  2. S

    Flat top end, hard to plane out

    2004 5.0GL Volvo Penta (305 vortec) runs great in the driveway, but really struggles to get to top end. Timing is set correctly and advances with throttle increase. carb rebuilt and tuned ( i increased the jets to 78, and installed a new 5.5 power valve. 20 lbs of vacuum at Idle of 700. , I...
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