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    High rpms low speed

    Hello ... I have a 1998 Bayliner 2855 with a 5.7 merc curser I went out today and my rpms were over 4000 doing 10kmh ??i have never had that issue before. Before I call my technician I am curious what could be the issues ??

    #2
    the hub may have spun in the prop... it happens sometimes, and is the most likely cause.
    were you getting any burning rubber smell? if so, this would indicate a spun drive coupler between the engine and the outdrive.


    NU LIBERTE'
    Salem, OR

    1989 Bayliner 2556 Convertible
    5.7 OMC Cobra - 15.5x11 prop
    N2K equipped throughout..
    2014 Ram 3500 crew cab, 6.7 Cummins
    2007 M-3705 SLC weekend warrior, 5th wheel
    '04 Polaris Sportsman 700 -- '05 Polaris Sportsman 500 HO
    Heavy Equipment Repair and Specialty Welding

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      #3
      No rubber smell and the engine sounded the same ! Isvthe a expensive repair?

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        #4
        Unless you have the resin infused glass hubs, it’s probably a spun hub. That’s a trip to a prop shop for servicing.
        P/C Pete
        Edmonds Yacht Club (Commodore 1993)
        1988 3818 "GLAUBEN”
        Hino EH700 175 Onan MDKD Genset
        1980 Encounter Sunbridge "Misty Blue" (Sold)
        MMSI 367770440
        1972 Chevrolet Nova Frame off Resto-mod in the garage
        Boating on the Salish Sea since 1948

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          #5
          Originally posted by swaile1977 View Post
          No rubber smell and the engine sounded the same ! Isvthe a expensive repair?

          Have you confirmed that there is not seaweed, rope, plastic bag over or around the prop? Did you get a visual on the prop for condition? Have you tried to put in in reverse to shrug off potential fouling?
          Northport NY

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            #6
            Originally posted by swaile1977 View Post
            No rubber smell and the engine sounded the same ! Isvthe a expensive repair?
            if its a spun hub, it will be less than $100 to have it replaced, and depending on the style, it could be as low as $30....


            NU LIBERTE'
            Salem, OR

            1989 Bayliner 2556 Convertible
            5.7 OMC Cobra - 15.5x11 prop
            N2K equipped throughout..
            2014 Ram 3500 crew cab, 6.7 Cummins
            2007 M-3705 SLC weekend warrior, 5th wheel
            '04 Polaris Sportsman 700 -- '05 Polaris Sportsman 500 HO
            Heavy Equipment Repair and Specialty Welding

            Comment


              #7
              Originally posted by Centerline2 View Post

              if its a spun hub, it will be less than $100 to have it replaced, and depending on the style, it could be as low as $30....
              It cost me $150 to replace the hub a few years ago on a Bravo II prop.
              1997 Maxum 2400 SCR 5.7LX Bravo II

              Mike

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                #8
                Easy to check the spun hub:

                - Raise the drive
                - Put a mark on the propeller nut
                - Put aligned mark on the propeller collar
                - Lower the drive (important )
                - Go for a ride
                - Raise the drive and look at the marks, if they are no longer aligned, prop hub is spun.
                Alex
                1997 2859, 7.4 MPI, Bravo II
                1993 2452, 5.7 Bravo II - SOLD

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                  #9
                  Thanks for the help very much appreciated

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                    #10
                    Spun hub, no big deal, just get a new prop..aluminum about $130.00
                    Hell, Michigan (yes we really live in a city named "Hell" in Michigan)
                    2012 BR 185 - 3.0 TKS
                    1999 Chaparral 233 Sunesta Ltd., 5.0 Volvo
                    1985 Harris Flotebote Classic 240
                    1993 Yamaha Waverunner III VXR
                    1993 Yamaha Waverunner III
                    1995 Yamaha Waverunner III GP
                    1995 Yamaha Waverunner III VXR PRO

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                      #11
                      Had the hub go on me this year while going down the lake. Prop is an older Michigan wheel 4 blade stainless. Probably 15 years old. Boat would run to 2200 then spin up. Skeg was fine, and when the prop came off, the hub was in bits. New hub fit in and it's been fine.
                      1996 2252 LS Capri Cuddy Cabin. Merc. 5.7L . Port Perry, Ontario, Canada.

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                        #12
                        Most likely your outdrive is plugged. I always put my boat in reverse once I leave my marina and before I do hole shot. This ensures the outdrive is clear of any debris, mostly seewed.
                        1994 2655 Bayliner, 5.0 merc, bravo 1

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                          #13
                          I had this same problem with loss of power and over revving but going nowhere really. It turned out that the outdrive and trim tabs were caked with barnacles. A lift and good jet wash soon sorted it out

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