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1996 Merc 150 on a 1990 231

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  • 1996 Merc 150 on a 1990 231

    Some advice please.

    I know someone with a 1990 231 CC in outstanding condition that he wants to sell. That's pretty much what I'm looking for. But I would think that should have at least a 200HP outboard, and preferably a 225 or 250

    But if it only has a 1986 150 HP Merc (newly rebuilt and about 100 hours), how well do you think it would perform? Owner says he is pleased with performance.

    Any chance that a 150 like that could be run for a while till I can spring for something bigger, maybe in a few years? Does anyone have experience running a 150 on a 231?

    Thanks for any advice. I know I need to do a sea trial but that requires some travel.

    Bill
    Bill Murphy

  • #2
    That boat will be wayy under powered. Youll be able to get away with it in calm water and near shore only but you wont be happy with that performance or mpg. Would honestly pick it up and sell the motor and look for an ox66 or oceanrunner thats at least a 200 if not 225 or 250
    *on the hunt for a 241/261*[br]1989 Mako 210 (sold and missed)

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    • #3
      quote:


      Originally posted by JohnB


      That boat will be wayy under powered. Youll be able to get away with it in calm water and near shore only but you wont be happy with that performance or mpg. Would honestly pick it up and sell the motor and look for an ox66 or oceanrunner thats at least a 200 if not 225 or 250



      Hi John,

      Thanks for the suggestion. How would you go about swapping an outboard? I see some apparent deals on ebay, but that involves some complications.

      What are some of the reasons why you prefer those brands?
      Bill Murphy

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      • #4
        You can YouTube videos that will show you how to remove and install an outboard its not hard just have to have time and an engine hoist (or make one). I picked the ox66 and ocean runner because they can be had cheap, are two strokes, and are well known to have a long lifespan. If money allows the new suzuki 225 or 250 would be perfect
        *on the hunt for a 241/261*[br]1989 Mako 210 (sold and missed)

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        • #5
          If you repower with the same brand it is really an easy job. Mercury used that same 9 pin connector for many, many years. I would be looking for a 2000-2005 EFI 225 or 250 horse merc. Or a Optimax with good credentials....
          [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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          • #6
            I do not know what the 231CC weighs - show I will share my personel current experience

            '79 235 CC Mako (23')Owner's manual says dry weight(bare hull) 2400 lbs.

            I have run a half a dozen different merc V6s on it ranging from 150 to 200 hp. Current set up is a 150 4 stroke.

            Performance was pretty much the same across the board with 200hp get just a few more MPH top end.

            Light load will run in low 40s (42-43 mph)

            Full fishing load - 4 guys, 100 lbs of ice, 50 lbs of drinks

            tackle boxes and full 30 gallon live well (that alone is over 200 lbs) and 75 gallons of fuel (near 500 lbs)

            36-38 mph

            I fish north gulf and 30 mph is normally all we care to run.

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            • #7
              Spec sheet shows this boat at 2880#'s. My 228 is shown at 2300#'s and I think under-powered with the 175 Etec 2 stroke.

              With an additional 580 lbs, I think the 150 would be extremely disappointing.

              And with 4 stroke you'd have to go 200 plus. At least the 2 strokes have that hole shot to get the boat out of the water.
              1984 Mako 228 w/ 175hp E-Tec [br]1983 SeaRay 26\' Sundancer w/ 454 Big Block spinning Volvo DuoProps (Sold)[br]1989 Wahoo 17\' CC w/ 88hp Evinrude (vacationing in Key West)[br]

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              • #8
                I have had several dozen 2 stroke 6Vs - 4 stroke has more low end torque period.

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                • #9
                  My 231 had 250 opti and rev4 prop which put it at about 48 WOT and 25 mph cruise. A 150 will be overworked pushing a boat that size. Id be looking for a 225-250 2 stroke to save weight and put a four blade prop on it. Youll lose some top speed but get good stern lift.
                  1989 Mako 261[br]SOLD - 1987 231 restore/rebuild http://classicmako.com/forum/topic.asp?TOPIC_ID=46836&whichpage=1[br]

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