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Project 21 performance data

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  • Project 21 performance data

    We had another really nice day and I took out the 21 for a good sea-trial. The Navman gps with fuel flow meter was working great. Here is what I observed. What do you think guys, about normal??

    wot. 50gal fuel 1 passenger. 45mph

    best economical cruise 35mph. 2.57mpg. @4200rpms.

    rpms at wot 5700 rpms.

    could only trim out a little before it started "porposing" I really cant install trim tabs unless they are the "narrow" kind because of the kicker motor and transducer placement.

    I will say the new transom is solid as a ROCK.

    dave
    [br]1994 Mako 215 Dual console Optimax 225[br]1978 Mako 19 with 90hp johnson[br]1996 Mako 22[br]1982 Mako 171 Angler 135 Black Max Mercury[br]1987 21b 225 Yamaha[br]1974 23 inboard Gusto gone.[br]1979m21 225johnson \"blue dolphin\" bought off this board and restored [br]with everyone\'s help!!Gone but not Forgotten....[br]1979 20 Mako 115 Suzuki gone[br]1977 19 Mako 115 Johnson gone[br]1976 23 Mako twin 140 Johnsons gone[br]1983 224 with closed transom and bracket[br]And 162 SOB (some other boats)[br]Venice Florida, Traverse city Mi.

  • #2
    Sound's good Dave. Have you been to Bennett's site to check about installing tab's? They have all the recommendation's on their site, but there is some leeway. It's not in stone. Some M120's would suit you well.

    http://www.bennetttrimtabs.com/

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    • #3
      Great site Wart, the illistration of the twin outboards fits my situation exactly. Do you think my transducers would work well mounted between my outboards? Or I could possibly even move them over to the port side. dave.
      [br]1994 Mako 215 Dual console Optimax 225[br]1978 Mako 19 with 90hp johnson[br]1996 Mako 22[br]1982 Mako 171 Angler 135 Black Max Mercury[br]1987 21b 225 Yamaha[br]1974 23 inboard Gusto gone.[br]1979m21 225johnson \"blue dolphin\" bought off this board and restored [br]with everyone\'s help!!Gone but not Forgotten....[br]1979 20 Mako 115 Suzuki gone[br]1977 19 Mako 115 Johnson gone[br]1976 23 Mako twin 140 Johnsons gone[br]1983 224 with closed transom and bracket[br]And 162 SOB (some other boats)[br]Venice Florida, Traverse city Mi.

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      • #4
        Or go to a shoot-thru transducer instead in your bildge somewhere. May have a line on those if your sonar is the right model. []
        Artie Sutherland[br]Rude Attitude -\'76 Mako 25 CC. - SOLD[br]1976 Mako 21[br]2002 Yellowfin 31 - 300 hp Suzukis[br]Gulf Coast, Mississippi[br]

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