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85% throttle showing 100% load

Discussion in 'Viking Yacht' started by Kahuna45, Oct 23, 2011.

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  1. Kahuna45, Oct 23, 2011
    #1
    Kahuna45

    Kahuna45 New Member

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    Have a 45 Viking Convertible with 900 MANS. The boat has sat for over a month and has signs of growth on it. Originally thought that it was fuel filters and changed them, but still have the same problem. The boat will just get up on plane but is slow. There is no fibration but I feel that this is due to growth. Showing 100% load at 85% throttle and stays at 100% load from 85% to 100% throttle. Any thoughts beyond growth on the bottom and props?
  2. Bamboo, Oct 23, 2011
    #2
    Bamboo

    Bamboo Senior Member

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    A dirty bottom is the first thing I'd suspect after sitting for a month. Have it cleaned and then check again.
  3. Kahuna45, Oct 23, 2011
    #3
    Kahuna45

    Kahuna45 New Member

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    Thanks.... Diver coming Tuesday
  4. Beau, Oct 23, 2011
    #4
    Beau

    Beau Senior Member

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    What are the historic numbers??
  5. Capt J, Oct 23, 2011
    #5
    Capt J

    Capt J Senior Member

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    If the bottom is dirty then that definately is the problem. Also make sure fuel filters are clean/new both primary and secondaries. If that's fine then the boat is overpropped.
  6. NYCAP123, Oct 24, 2011
    #6
    NYCAP123

    NYCAP123 Senior Member

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    This has been a summer for serious growth up here. I took a boat out of Conscience Pt. 2 weeks ago that had been sitting. Wouldn't come on plane, vibrated like a Motel 6 bed. Luckily she only had to fo a few miles to her winter home because I could only make 7.5 kts without shaking her apart. We typically start getting the bad growth during the last 2 weeks of August up here. This year it was more like being in So. Florida. Your diver should have you back in shape, but don't be surprised if he charges you a bit extra. He'll have a lot of scraping to do.
    P.S. If the diver does good by you please PM me his info. The guy I usually recommend has retired. Thanks.
  7. RT46, Oct 24, 2011
    #7
    RT46

    RT46 Senior Member

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    I agree, check for bottom growth.

    I came out for Irene and bottom was clean.

    Just yesterday I noticed that the bottom was pretty slimed.....

    a few barincles or some growth on the shafts and wheels can easily knock off a few hundred RMP off the top.


    oh yea, check the racors too....did you mention that in OP?

    good luck
    RT46
  8. RT46, Oct 24, 2011
    #8
    RT46

    RT46 Senior Member

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    ok, i went back and read the OP,
    yes you did ck the filters....

    I bet it is the growth on the bottom