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  1. #1
    Join Date
    Mar 2011
    Posts
    11

    Default newbie question on Volvo TAMD 71 s

    Hi i have no boat at the moment, looking at various options 1 is a fairline with Volvo 71s just wondering abot possible problems with them fuel consumption on a 14 met fairline if anyone runs one what kind of rpm is cruise? They wont be opend up too often.
    Any advice welcome,

  2. #2
    Join Date
    Oct 2003
    Location
    Kent
    Posts
    9,047

    Default Re: newbie question on Volvo TAMD 71 s

    Hello there, I have 71B's in a Fairline 43-45 (46 ft)
    I have never worked them out personally but these are the book figures, please remember that they will vary with weight, fouling and weather conditions. I normally go for between 1900-2100rpm in the cruise which gives me between 19-21 knots. For displacement I use 1100-1200rpm.
    Per engine.
    1100 rpm...10.1 lph
    1400 rpm...19.3 lph
    1700 rpm...29 lph
    2000 rpm...37.25 lph
    2300 rpm...49.4 lph
    2600 rpm...78 lph.
    Last edited by Nauti Fox; 06-10-19 at 11:26.

  3. #3
    Join Date
    Mar 2011
    Posts
    11

    Default Re: newbie question on Volvo TAMD 71 s

    Thanks for the information that is helpful.
    What rpm does it need to maintain it on the plane?
    Any problems i should be looking for on a mid 1980 boat?
    Regards Harvey

  4. #4
    Join Date
    Apr 2007
    Location
    midlands
    Posts
    7,346

    Default Re: newbie question on Volvo TAMD 71 s

    Quote Originally Posted by Muxey View Post
    Thanks for the information that is helpful.
    What rpm does it need to maintain it on the plane?
    Any problems i should be looking for on a mid 1980 boat?
    Regards Harvey
    Corroded heat exchanger housing both the alloy outer and the tube stack especially the starboard engine as you can t see the bottom areas of the coolers .

  5. #5
    Join Date
    Oct 2003
    Location
    Kent
    Posts
    9,047

    Default Re: newbie question on Volvo TAMD 71 s

    Quote Originally Posted by Muxey View Post
    Thanks for the information that is helpful.
    What rpm does it need to maintain it on the plane?
    Any problems i should be looking for on a mid 1980 boat?
    Regards Harvey
    Can't really say as I tend to stick to those settings, it does need the trim tabs fully down though or it will sit very bow high.

  6. #6
    Join Date
    Mar 2011
    Posts
    11

    Default Re: newbie question on Volvo TAMD 71 s

    Thanks, had to smile when I looked at your profile seeing you are a ducati fan , my raceing days are well over and just decided to quit track days so thr TT 1 has to go and make way for a boat 😁

  7. #7
    Join Date
    Oct 2003
    Location
    Kent
    Posts
    9,047

    Default Re: newbie question on Volvo TAMD 71 s

    Used to race with Bemsee but was only a middling racer but found I was better at spannering and ended up working in various teams, now run a little independent Ducati workshop.

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