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86 Yamaha 115'S

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  • 86 Yamaha 115'S

    need an opinion. Have a 1986 Mako 224 with original 86 model twin Yamaha 115s. Engines run good,rebuilt carbs last year, had engines tuned,had to replace a corroded timing arm, replace popit valves. All this said the engines have alot of corrosion, paint coming off and look bad. Since engines are running but ugly now I am hoping to get this season out of them and start shopping for another set. My issue is should I get the engines painted and keep dropping money in repairs or look for a set of used. I dont have the funds for new and was wanting to see if anyone had an inside track on how to ack down a set of good used twins prefferably Yamaha with 20 inch shafts to match up controls and transom

    Any wisdom on the subject appreciated.
    1986 Mako 224 twin 1986 Yamaha 115\'s - repowered with 2005 200 Yamaha HPDI[br]

  • #2
    Do you realize that you can get a crate motor, 115HP 2 stroke, from Eds Marine Superstore for $5500 each plus shipping? Brand new, two year warranty.
    1987 Mako 254, 2013 Evinrude ETEC 175\'s (sold to my buddy)[br]1988 Mako 20, 2008 Yamaha 200HPDI (sold)[br]1984 Mako 17, 2005 Suzuki 115 (sold)[br]1981 Mako 21 (sold)[br]1978 Mako 17 (sold)[br]1986 Mako 260 (sold)[br]1997 Mako 232 (sold)[br]Tampa, Florida

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    • #3
      At some point you will have to understand the motors are almost 20 years old and all the money you pour into them, still leaves you with an almost 20 years old set of motors. Technology has come along way over the 20 years and there may be additional benefits that you are not considering.

      Have the powerheads been rebuilt? I've been down that road before with a 1987 200 Yamaha and 1987 225 Yamaha in the past.

      David M
      Current Mqko - 1990 Mako 211 w/2006 250 E-TEC. http://www.classicmako.com/forum/topic.asp?TOPIC_ID=6226. [br]- Previous Makos 1987 20C, 1979 23\' IB, 1970s 17 Angler

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      • #4
        If your powerheads havnt been off...Yam used a steel shift rod in those era engines. They melt away over time...we pulled our '90 200s apart three or four years ago, the 3/8 rods were down to maybe 1/16th of an inch in some places.

        To replace, the powerheads have to come off. And though these yams have been pretty good, I will say they are, particularly in that time frame, light years behind omc and merc in terms of corrosion inhibition. Getting a powerhead off of a Yam that old is a FRIGGIN nightmare. I cant emphasize that enough. I mean, the year before we did ours, I pulled the powerhead off of a 110 rude by myself in a few hours. The yams were a completely different animal. Myself, my engineer father, and our machinist friend burned the better part of a few weekends just getting the powerheads off.

        What I'm getting at is it's getting time to fold your hand. Start saving and plan on going shopping.
        1990 261 T/2001 200 HPDIs[br]Basking Ridge/Mantoloking NJ[br]

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        • #5
          Anyone had any dealings with Ed's Marine Superstore???
          1986 Mako 224 twin 1986 Yamaha 115\'s - repowered with 2005 200 Yamaha HPDI[br]

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          • #6
            MY$.02

            There is alot to be said for an engine that still runs good and is reliable(key word reliable). Engines can be repainted with minimal expense, but the real thing to consider is the engine(s) going to leave you stranded and in harms way. I have an old Yamaha of that ventage,(lots of preventative maint.) and know first hand that the life span of the ignition components will start to come in play. If you keep the engines always carry a 10mm wrench a repair manual and spare parts.

            P.S. "there is no substitute for good working gauges."

            Temp/volts/H20 pressure!!!!!

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            • #7
              Word on the street is the Ed's will give you the best deal on a lose motor, but their guages/harnesses and such are expensive.
              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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              • #8
                I bought a 115HP 2 stroke from Eds last fall. It was a great experience. Their accessories are full list, no deal there. I bought everything that I needed, brand new, off ebay and saved a bundle. A blind monkey with one arm could rig a Yamaha, they have basically dummy proofed them.
                1987 Mako 254, 2013 Evinrude ETEC 175\'s (sold to my buddy)[br]1988 Mako 20, 2008 Yamaha 200HPDI (sold)[br]1984 Mako 17, 2005 Suzuki 115 (sold)[br]1981 Mako 21 (sold)[br]1978 Mako 17 (sold)[br]1986 Mako 260 (sold)[br]1997 Mako 232 (sold)[br]Tampa, Florida

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                • #9
                  Here is a question. Will the original controls, hydraulic steering and gauges work with the new Yamaha engines - I have digital tachs, water pressure gauges etc. that look original and all work
                  1986 Mako 224 twin 1986 Yamaha 115\'s - repowered with 2005 200 Yamaha HPDI[br]

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                  • #10
                    Probably.
                    ..........
                    2006 Northcoast 19[br]East Greenwich, RI

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                    • #11
                      Your 704 controller and cables would be fine. The speedo is probably fine too, but I think the tach on the newer ones has a different plug. The oil tank has a different plug, but you can adapt to your old tank easily.
                      1987 Mako 254, 2013 Evinrude ETEC 175\'s (sold to my buddy)[br]1988 Mako 20, 2008 Yamaha 200HPDI (sold)[br]1984 Mako 17, 2005 Suzuki 115 (sold)[br]1981 Mako 21 (sold)[br]1978 Mako 17 (sold)[br]1986 Mako 260 (sold)[br]1997 Mako 232 (sold)[br]Tampa, Florida

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                      • #12
                        Went down to the boat storage yard and got the engine raised-put in tilt/trim fluid and as if by magic it goes up and down now.Did see why the fluid drained out -while raising fluid is bubbling out slowly from under the trim motor where it mounts -guess it takes afew weekends on the water to drain. I assume there must be seal here. Do I Have to pull the engine off to take the trim motor off - I can see two bolts visiable one in front and one on back right side.

                        Other choice I guess is keep topping off the fluid resovoir every couple of weeks.
                        1986 Mako 224 twin 1986 Yamaha 115\'s - repowered with 2005 200 Yamaha HPDI[br]

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                        • #13
                          You should be able to rest the motor on the flip down brackets and get to the pump with no real issues. Getting it off for the first time may be an issue though due to corrosion over the years. Think "Get a bigger hammer" [].
                          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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