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  • Stern Heavy 20c

    I recently came across a pretty good deal on a counter rotating 03 OX66 150 to repower with. I know its not ideal with LH rotation but it was a deal I couldnt pass up. I replaced an old 85 140 Evinrude that had 1 bad cylinder. This motor is about 100lbs heavier than my old motor. Since Ive had this Yamaha I started taking waves over the transom when it gets sporty so I made the splash guards and they work well. I also changed to the ball scuppers (the clicking sound they make drives me nuts) cause my flapper type was letting lots of water in that would roll around the splashwell and slowly get through my pie plates and into the bilge. Pie plates are fairly new, I replaced them with new just over a year ago. I still have my 2 batteries in the starboard side stern and a 3 gallon oil tank on the port side. Ive been planning on moving them under the console for some time. I will definitely be doing it this winter. Would you all agree that my stern is to low? How much height will I gain by moving the batts forward? Also, in this photo I have a bout 45 or so gallons of fuel in the tank.


    Long Island NY [br]1985 Mako 20C[br]2003 Yamaha OX66 150[br]

  • #2
    Ive seen worse but you could argue that its a little low.

    Is that the ping pong I see on starboard. I dont think youll see much difference Moving batts. Maybe 1/2 .

    I think Ive seen pics of some guys seeing better gains than 1/2
    1984 Mako 238 WA [br]2015 Suzuki 250 APX[br]Central PA/OCMD[br]http://www.classicmako.com/forum/topic.asp?TOPIC_ID=35081[br]

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    • #3
      Maybe an inch low. I had my batteries under the console. And I assume the dog is at least 60 lbs.

      I never had problems with water in the motor well.
      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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      • #4
        My 20B with a 99 Johnson 150 25" and how it sits looks just about like yours. I redid my transom and raised it to 25, built in splash guards and the whole thing full of Arjay pourable which I tested and doesn't float. Still have batteries in the back and no oil tank. I have the two ball scuppers on left and right and center plug I plug from inside, just in case I need to vacate some more water quickly. Do you have the center drain on yours? That one would conflict with a scupper and the motor, hence the plug solution. Without a plug in there, I get some standing water over the pie plates and some creeps into my cooler (livewell in yours) if 2 guys fish in the back.
        [br]\'82 Mako 20B http://www.classicmako.com/forum/topic.asp?TOPIC_ID=59077

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        • #5
          My 20c never had those issues unless I was holed up bottom fishing and stern to the waves and then the pie plates leaked badly until I replaced with better ones and sealed them properly. My batteries and oil tank were in the console which helped a lot.

          GREAT looking 20c - I loved mine.
          1978 Mako 25 - Blind Hog
          1985 Mako 20c - sold
          Fort Walton Beach, FL
          http://www.classicmako.com/forum/top...TOPIC_ID=42841

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          • #6
            quote:


            Originally posted by brando


            Is that the ping pong I see on starboard. I dont think youll see much difference Moving batts. Maybe 1/2



            That is the ping pong ball and thats unfortunate news, was hoping Id see more than a 1/2 inch height gain
            quote:


            Originally posted by Noname Dave


            Maybe an inch low. I had my batteries under the console. And I assume the dog is at least 60 lbs.

            I never had problems with water in the motor well.



            I think an inch would make somewhat of a difference. And yes, Thor is a 90 pound American Bulldog. Ive attached a pic of my water line with my old 140.
            quote:


            Originally posted by dipmiami


            My 20B with a 99 Johnson 150 25" and how it sits looks just about like yours. I have the two ball scuppers on left and right and center plug I plug from inside, just in case I need to vacate some more water quickly. Do you have the center drain on yours?



            Ive been following your thread. Great work, boat looks great! I dont have the center drain on mine. I just have the two 1 1/4 drains on either side of the splashwell.
            quote:


            Originally posted by Sailor


            My 20c never had those issues unless I was holed up bottom fishing and stern to the waves and then the pie plates leaked badly until I replaced with better ones and sealed them properly. My batteries and oil tank were in the console which helped a lot.


            GREAT looking 20c - I loved mine.


            Thanks Sailor!
            [/URL]

            Waterline with my old 140

            [/URL]

            Side shot with the Yamaha
            Long Island NY [br]1985 Mako 20C[br]2003 Yamaha OX66 150[br]

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            • #7
              I think moving the batteries and oil would make a difference. In my 21 I had the batteries and the oil in the stern as well and I had similar issues. I moved the batteries to the console but left the oil tank, made a big difference in ride, and water splashing in while fishing. Let's just say the battier are 40 pounds each, the oil if the 3 gallon tank is full is roughly 20 pounds, plus removing the 90 pound dog you could have 190 less pounds in the stern that what is in your photo. Will it ride as high as with your 140, maybe not, but it will probably be close.


              Current
              '76 Mako 25 w/ '03 300 Yamaha HPDI
              Previous
              '85 Mako 21B w/ '94 225 yamaha
              '73 Mako 19 w/ '96 112spl Evinrude
              Brick, NJ

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              • #8
                If the Yamaha weighs 100lbs more then the evinrude, by moving the batteries and oil tank to the console will probably get you close to where you were, if we assume the console is the balancing point of the hull. Two batteries and 3 gal of oil will likely weigh 100+.

                If it doesn't change the waterline that much. It should still have some effect on how much the stern dips when the boat is rocking.
                Long Island, New York

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