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    Fuel consumption 2855

    Hi All I am new to this site so please treat me gently and hopefully I am not asking a daft question.
    I am looking at purchasing a 1999 2855 bayliner with the 300hp mercrusier petrol engine. It will be used on a lake at maximum 10mph most of the tims. Please can anyone advise on the expected fuel consumption per hour at this sort of speed. Thanks for your help Paul

    #2
    You might achieve 3mpg at that speed. Bring it onto a plane and maybe 2mpg.
    2007 Discovery 246
    300mpi BIII
    Welcome island Lake Superior

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      #3
      I have a 2004 Bayliner 285 with the Mercruiser 350 MAG/MPI 5.7L 300 HP, cruise mostly on the ocean/gulf/intercoastals... I'm more used to gallons used per hour, but with pretty constant cruising at ~3,000 rpm and ~20 mph, I'm burning around 7 gallons per hour. I would guess that if your keeping it around 10 mph, you'd nearly get double that. Although, at some point there's a slow enough speed that takes away from fuel efficiency. With a 108 gallon tank, I would think you could spend ALL DAY on the lake using under a quarter tank (~20 gallons).
      2004 Bayliner Cierra 285
      1987 Bayliner Capri 1950 (sold)
      Intercoastal Panhandle FL

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        #4
        You are going to need to open her up once in awhile. I would think that running at 10 MPH all the time might lug the engine a bit. You gotta run them hard once in awhile.
        Rick Grew

        1981 Carver 3007 Aft Cabin

        2004 Past Commodore
        West River Yacht & Cruising Club
        www.wrycc.com

        Comment


          #5
          Here's a chart for the 285 with 300 hp 350 mag.

          RPM MPH KNOTS TOTAL GPH MPG NMPG RANGE NM RANGE dBA
          600 3.9 3.4 0.9 4.51 3.92 414 360 60
          1000 6.1 5.3 1.3 4.8 4.18 441 383 68
          1500 7 6 2.2 3.16 2.75 290 252 70
          2000 8.9 7.7 4.4 2.01 1.75 184 160 74
          2500 11.1 9.6 7.9 1.4 1.22 129 112 80
          3000 18.8 16.3 9.9 1.89 1.65 174 151 81
          3500 23.8 20.7 12 1.99 1.73 182 159 82
          4000 31.2 27.1 14.7 2.12 1.85 195 169 86
          4500 35.3 30.7 18.8 1.87 1.63 172 150 87
          5000 37.9 32.9 20.7 1.83 1.59 168 146 89


          2008 Rinker 330 EC
          Twin 350 MAG Bravo 3
          2007 285 (sold)
          350 Horizon Bravo 3

          Comment


            #6
            Originally posted by Spyderweb2 View Post
            Here's a chart for the 285 with 300 hp 350 mag.

            RPM MPH KNOTS TOTAL GPH MPG NMPG RANGE NM RANGE dBA
            600 3.9 3.4 0.9 4.51 3.92 414 360 60
            1000 6.1 5.3 1.3 4.8 4.18 441 383 68
            1500 7 6 2.2 3.16 2.75 290 252 70
            2000 8.9 7.7 4.4 2.01 1.75 184 160 74
            2500 11.1 9.6 7.9 1.4 1.22 129 112 80
            3000 18.8 16.3 9.9 1.89 1.65 174 151 81
            3500 23.8 20.7 12 1.99 1.73 182 159 82
            4000 31.2 27.1 14.7 2.12 1.85 195 169 86
            4500 35.3 30.7 18.8 1.87 1.63 172 150 87
            5000 37.9 32.9 20.7 1.83 1.59 168 146 89


            I was going to say that 10 mph is too fast to be efficient and this table bears it out. Boats like ours are generally most efficient at hull speed. The formula is pretty straight forward: 1.34 times the square root of the waterline length in feet (HS = 1.34 x √LWL). The other speed where are boats are efficient is about 2 or 300 rpms above plane.

            Anyway, welcome aboard. This is a very active and helpful board. When you have a moment, include info about your boat in your sig so when you have questions in the future, the important info is already there. Cheers.

            Doug
            Hanging Loose
            98 Carver 350 Mariner
            2013-
            KRUSTY KRAB
            2001 305
            5.7 BII
            2006-2013

            Comment


              #7
              Originally posted by Sutty View Post
              Hi All I am new to this site so please treat me gently and hopefully I am not asking a daft question.
              I am looking at purchasing a 1999 2855 bayliner with the 300hp mercrusier petrol engine. It will be used on a lake at maximum 10mph most of the tims. Please can anyone advise on the expected fuel consumption per hour at this sort of speed. Thanks for your help Paul
              Thanks to everyone that helped answer my question. It is very much appreciated and I am now more educated,

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