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Fuel Burn 25 mako

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  • Fuel Burn 25 mako

    I have a 251 mako with twin 1996 225 efi mercs and calculated about 1mpg at 3800rpm at 37mph with 21p Mirage props. Does this seem right for this hull with these motors? I feel like I am burning a LOT of fuel on longer trips offshore.
    [br]1996 251 Mako Twin 3.0L Merc EFI[br]Oceanside, NY[br]

  • #2
    Sounds like you are really humping along if you are running 37 mph and only turning 3800 rpms. What do your engine wind up to? Are you reaching the upper end of the WOT rpm range? If you think you are burning too much fuel, you can drop down a little pitch to say 19 inch props and it will raise your economy by making it easier for the engine to spin the props. You will lose a little speed but the reduced fuel burn might offset that.
    Chris Miller[br]Mystic Islands, NJ[br]1974 17 Classic[br]1988 211 Classic (sold)[br]1990 Grady White 230 Gulfstream (sold)[br][img][br]

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    • #3
      Engines wind up to about 5500 at 53mph, but i almost never run it up that high. Is it worth changing props?
      [br]1996 251 Mako Twin 3.0L Merc EFI[br]Oceanside, NY[br]

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      • #4
        You're okay with the RPM you're running. Those are good engines but were never considered fuel efficient.
        2007 Everglades 243 250 Suzuki[br]1988 201 Yamaha 200 - Sold[br]1990 261 T/200 SWS - Sold[br]1978 25 225 Johnson - Sold[br]1975 20 85 Merc - Sold[br]Jacksonville, FL[br]

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