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not getting full power-gctid396155

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    not getting full power-gctid396155

    i've asked this before. i have a 2655 with mercruiser 5.0L with alpha 1. used to get 4800 rpm and 36+mpg at WOP. now max out at 3300 rpm and 26 mph. this is with just 2 people. same prop, bottom clean, engine sounds great etc. planes just fine at about 3000 rpm. my mechanic did some prop work and said pitch was perfect. only additional weight is a 9.9 honda kicker on port swim platform. ideas???

    Change your spark plugs.

    I had the exact same symptoms a couple of years ago, spent $1K on everything from new carb to fuel pump to spark plug wires.

    In the end, it was $40 worth of spark plugs.
    '99 2355 Ciera (SOLD)
    5.0L Alpha One
    Austin, Texas


      I had one bad plug previously on our 285 w350 MPI. It killed performance.

      Rev'd fine at the dock. But under load it was a dog.

      One bad plug.
      Jim McNeely
      New Hope a 2004 Bayliner 305 Sunbridge Express Cruiser
      Twin 5.7s with Bravo2 drives
      Brighton, Michigan USA
      MMSI # 367393410



        Be good, be happy, for tomorrow is promised to no man !

        1994 2452, 5.0l, Alpha gen. 2 drive. Sold ! Sold ! Sold !

        '86 / 19' Citation cuddy, Merc. 3.0L / 140 hp 86' , stringer drive. Sold ! Sold ! Sold !

        Manalapan N.J