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1979 Mako 21

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  • 1979 Mako 21

    I have recently bought a 79 21 foot Mako in good shape with a 90 Johnson 200 which I am told by the owner needs work (low compression and weak tilt). I have decided to go low tech and replace the 200 with a new 175 Johnson so that I can do maintenance myself and have access to a good dealer in my area. Are there any issues with this vintage 21 I should be careful of and does anyone have any thoughts on a better repowering plan? Any comment would be appreciated. She's abeauty and I want her to be right when done.

  • #2
    Can't comment in regard to your vintage hull, but in regard to repowering with a 175, I think you might be under powering it. Does it have a T TOP? What type of weight will you be carrying etc? I presently have a 200 on my 21 and I am not real happy with the performance. My plan is to install trim tabs in hopes that cruise and WOT performance improves. If that doesn't help I am going to step up to at least 225HP. Maybe somoene with a 175 can jump in here and comment further.

    Ron

    1993 Mako211CC

    200 Black box
    Ron[br]26 Regulator CC[br] \"Blood Shot\"[br]Mt Laurel & Tuckerton NJ[br]www.bizprosolutions.com

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    • #3
      I must agree about the power. I went to a from a 200 to a 225 on my '78 21 and it was a night and day difference. Rigged with a ttop and crow's nest the 225 made it comfortable to fish 3 guys and all the gear. The hull? no complaints at all. Large trimtabs made it awesome. We fished it 50 miles from shore regularly:



      She's gone now, making someone else happy...
      \'87 261 200 yamis[br]\'86 Actioncraft 130 yami[br]Palm Harbor,Fl

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      • #4
        PeteH

        Do you have any idea what your performance numbers were with your 200 vs what they are now with your 225?

        I am running @ 4200 RPM to cruise at 24/25 mph and WOT is 33/34 MPH @ 5600 PRM. Those are GPS numbers. That is with 2 people and 60/70 gallons of fuel. I a turning a 4 blade SS 17 degree prop.

        Ron

        1993 Mako211CC

        200 Black box
        Ron[br]26 Regulator CC[br] \"Blood Shot\"[br]Mt Laurel & Tuckerton NJ[br]www.bizprosolutions.com

        Comment


        • #5
          I too had a Yamaha V6 Excel (which is about 200 hp) on my Mako 21. It was miserable. I had very poor hole shot, even with an empty boat. Trying to pull water skiers was a pain. Fuel economy was horrible because I was always trying to make at least 30mph. When I had 3 guys in the boat + gear, the boat was even worse. I just didn't have the power to run comfortably for me and the motor.

          I was running a 16"Pitch wheel and WOT was around 5400rpm at 40 mph (unloaded). I went to the 225 EFI Merc. and She runs the almost the same reguardless of load. With a light load I can turn up 5700rpm at 50mph.

          I'm all for max power on these heavy boats. In fact there is a fellow Mako 211 owner on this board who has a 250 Merc. He told me he'll never go back to even the 225!


          Slidell, LA 1993 Mako 261B - Temperance

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          • #6
            I wish I hade a 225 but I'm still happy with the 200. 3 Guys 170 to 200 lbs ea. w/ beer, ice, food, and gear on fresh water I was getting 42 MPH at 5600 RPM on the GPS. That's with a 15 1/4 ( I think) X 19 pitch alum. prop. The engine in mounted 1 hole up from the max depth. This was done to stop ventilating and over reving. Pulling a skier up on 1 was a non issue with 3 others on the boat.

            1985 Mako 21 B 2003 200 HP Mercury SW Classic
            2003 Boston Whaler 255 Conquest w/ twin 200 HPDI\'s. MA & ME

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            • #7
              Mist..

              Do you have a T TOP on your boat and how much fuel do you have on board?

              Ron

              1993 Mako 211CC

              200 Black Box
              Ron[br]26 Regulator CC[br] \"Blood Shot\"[br]Mt Laurel & Tuckerton NJ[br]www.bizprosolutions.com

              Comment


              • #8
                One things for sure... Mercs have bigger kajonees than any other motor. A 200 Merc is about as strong as a 225 in any other brand[:0][:0]


                Slidell, LA 1993 Mako 261B - Temperance

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                • #9
                  Live Bait, No T top[]. The bottom really needs a stripping and a fresh start if any paint at all. The longest the boat sits is 3 to 4 weeks in VERY cold fresh water. Other that that it's trailered around. The Mako 21 B holds 86 gallons.

                  1985 Mako 21 B 2003 200 HP Mercury SW Classic
                  2003 Boston Whaler 255 Conquest w/ twin 200 HPDI\'s. MA & ME

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                  • #10
                    Can't imagine smaller than 225. Have 1988 21B (21'7"). Cruise @ 4600 RPM 28-30 MPH, 12 GPH. WOT 6100 @ 42 MPH. OMC SST 21 Prop.

                    A new direct inject 200 might fill the bill.

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                    • #11
                      Charles, I have 1980 215 with '92 225 Evinrude and I am very happy with the performance. I have a 19" stainless prop which also aids the performance. 4200rpm = approx 30mph. Go with the biggest allowable power it also enhances the resale value. Too many underpowered boats out there.

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                      • #12
                        The 200 Johnson on my 76 221 gave me up to 46mph on the GPS. I dont recall what the RPM's were, but she was screamin pretty good. I tried not to run her that hard as the motor had quite a hours on her before she let a cylinder go last October. I have to take a look at the prop, been so long since I ran the thing. Hopefully by the spring I will have her back together and chasing stripers again.
                        Greenwich, NJ[br]1976 22B

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                        • #13
                          Loaded with 110 gallons of fuel, livewell full of water, and an unbelievably heavy T-Top, I cruise 30 MPH @ 4200 RPM's.

                          2000 Suzuki 225

                          87 21B

                          Prop Pitch & Diameter unknown.

                          Aren't these hulls rated 230hp?

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                          • #14
                            I ran a 1989 200 yami with a 17p yami wheel originally. I had the wheel beat down to a 16p to get the 5500 rpms. She ran @40mph. Then I put a 250 yami on turning a 19p. 45mph at 5500. Final engine was the 225 with the same 19p. 47 mph @5500. All the props were the old style yami stainless. I tried a number of different props but those yamis gave the best overall performance. BTW the engines were mounted as high as they would go...
                            \'87 261 200 yamis[br]\'86 Actioncraft 130 yami[br]Palm Harbor,Fl

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