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Short shaft availability....or long shaft to short shaft conversion

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  • Short shaft availability....or long shaft to short shaft conversion

    I repowered a 1950s Orlando Clipper tinny from a 1968 55 HP Johnson to a 40HP Nissan.

    At the time that I bought the motor it was the most HP in a short shaft that I could find.
    I hadn't found this website yet so all the research and options were what I found myself. I was hoping for a 50HP SS but 40HP was as big as I could find.

    Although it is too late and i don't need to change anything now, I have wondered, and might as well ask....

    Would it have been possible and/or feasible to convert from a 50 HP log shaft to a short shaft?
    You do not need a parachute to skydive. You only need a parachute to skydive twice.

    I don't belong to an organized political party. I'm a Democrat. (Will Rogers)



  • #2
    Re: Short shaft availability....or long shaft to short shaft conversion

    The 40 and 50 are the same engine so..........
    Elvin
    My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

    The 3 Rules:

    1) Look in your service manual first...Then ask me if it is correct.
    2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
    3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

    Comment



    • #3
      Re: Short shaft availability....or long shaft to short shaft conversion

      Originally posted by TOHATSU GURU View Post
      The 40 and 50 are the same engine so..........
      Arrrrrrrrrrggghhhh....I think....

      So the extra length is probably an insert piece that could have been removed if I had bought the 50HP long shaft and the drive shaft would have had to be replaced?
      It likely would have been more $$ than I would have wanted to spend at the time.

      What is the actual difference between the 40and 50 that give it the extra 10 HP?
      You do not need a parachute to skydive. You only need a parachute to skydive twice.

      I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

      Comment



      • #4
        Re: Short shaft availability....or long shaft to short shaft conversion

        "So the extra length is probably an insert piece that could have been removed if I had bought the 50HP long shaft"

        No, the intermediate motor leg would have to be changed out as well as the water tube, shift rod and drive shaft. Around $700.00 in parts.

        Depends on which series of 40/50 you have. All have the same leg system, but, some have different carbs and exhaust pipes, some have different blocks and cranks and some have different ECUs.
        Elvin
        My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

        The 3 Rules:

        1) Look in your service manual first...Then ask me if it is correct.
        2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
        3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

        Comment



        • #5
          Re: Short shaft availability....or long shaft to short shaft conversion

          It's a 2005 Nissan 40 HP 2-stroke
          You do not need a parachute to skydive. You only need a parachute to skydive twice.

          I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

          Comment



          • #6
            Re: Short shaft availability....or long shaft to short shaft conversion

            Years don't mean anything and aren't used. It's all about model and serial number.
            Elvin
            My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

            The 3 Rules:

            1) Look in your service manual first...Then ask me if it is correct.
            2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
            3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

            Comment



            • #7
              Re: Short shaft availability....or long shaft to short shaft conversion

              It's an NSD-40.
              You do not need a parachute to skydive. You only need a parachute to skydive twice.

              I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

              Comment



              • #8
                Re: Short shaft availability....or long shaft to short shaft conversion

                If you have a TLDI then the ECM would have to be changed.
                Elvin
                My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

                The 3 Rules:

                1) Look in your service manual first...Then ask me if it is correct.
                2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
                3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

                Comment



                • #9
                  Re: Short shaft availability....or long shaft to short shaft conversion

                  Hmm, can you mount the motor 5 inches higher on your transom? That is a quick fix to convert a long shaft to a short shaft. I have seen this done but do not know the effect on performance. Just thinking about it, I can not see any effect other than appearance.

                  Comment



                  • #10
                    Re: Short shaft availability....or long shaft to short shaft conversion

                    Originally posted by TOHATSU GURU View Post
                    If you have a TLDI then the ECM would have to be changed.
                    Not a TLDI, just the garden variety 40 HP....
                    You do not need a parachute to skydive. You only need a parachute to skydive twice.

                    I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

                    Comment



                    • #11
                      Re: Short shaft availability....or long shaft to short shaft conversion

                      Originally posted by psteurer View Post
                      Hmm, can you mount the motor 5 inches higher on your transom? That is a quick fix to convert a long shaft to a short shaft. I have seen this done but do not know the effect on performance. Just thinking about it, I can not see any effect other than appearance.
                      It would raise COG too much.
                      The 40 HP is a perfectly good match for the boat, and the Nissan is a sweet motor.
                      I was just curious whether i missed any options, and if by some miraccle and alignment of stars and moon I could buy parts to upgrade it to 50 HP for a few hundred $$$ I would probably consider it.
                      You do not need a parachute to skydive. You only need a parachute to skydive twice.

                      I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

                      Comment



                      • #12
                        Re: Short shaft availability....or long shaft to short shaft conversion

                        Then you don't have a NSD40...So, what do you have?
                        Elvin
                        My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

                        The 3 Rules:

                        1) Look in your service manual first...Then ask me if it is correct.
                        2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
                        3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

                        Comment



                        • #13
                          Re: Short shaft availability....or long shaft to short shaft conversion

                          Sounds like you have the NSD40, which is a TLDI. To upgrade to a 50, you would change the ECM.
                          Paul
                          Certified TLDI Technician
                          Buffalo NY USA

                          Comment



                          • #14
                            Re: Short shaft availability....or long shaft to short shaft conversion

                            OK, NOT NSD40, it's NS40D
                            You do not need a parachute to skydive. You only need a parachute to skydive twice.

                            I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

                            Comment



                            • #15
                              Re: Short shaft availability....or long shaft to short shaft conversion

                              A 40 D could be either a block, crank, carbs and pipe change or just a carbs and pipe change. Depends on the serial number.
                              Elvin
                              My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

                              The 3 Rules:

                              1) Look in your service manual first...Then ask me if it is correct.
                              2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
                              3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

                              Comment

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