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Mercury Thunderbolt year?

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  • Mercury Thunderbolt year?

    I know you've seen this post a million times but I've been through the forums and can't find the answer.
    I have a Mercury Thunderbolt 50. It is black with a blue stripe under the mercury logo. I can't use the serial number as it has been worn off over the years as the steering has rubbed it away. The serial plate was on the front of the motor under the steering mechanism. It is also a pull start if this helps.
    Thanks in advance.


  • #2
    Re: Mercury Thunderbolt year?

    Welcome to iboats!! The serial number might be stamped into the engine block, have a look. It will be 7 or 8 digits. Without it, getting the year is very, very hard for us to give you.
    Rest in Peace Spinner

    2010 Lowe FM 175 with a 2010 115 Mercury
    ------------------------------------------------
    Your friend,your partner, your defender,your dog.You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion....by E.F. Henry

    Comment



    • #3
      Re: Mercury Thunderbolt year?

      Thanks
      Any Idea where they would have stamped the serial into the block? I've been all over it and haven't seen anything that looks like a serial number.

      Comment



      • #4
        Re: Mercury Thunderbolt year?

        Mine is on the starboard side towards the rear. If the engine isn't clean, you may have a harder time finding it. HTH
        Rest in Peace Spinner

        2010 Lowe FM 175 with a 2010 115 Mercury
        ------------------------------------------------
        Your friend,your partner, your defender,your dog.You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion....by E.F. Henry

        Comment



        • #5
          Re: Mercury Thunderbolt year?

          Post a pic of the starboard side of the motor with all cowlings removed. We may be able to help a little better

          Comment



          • #6
            Re: Mercury Thunderbolt year?

            There should be a number stamped on the block right side somewhere...look under rubber hoses.. maybe covered up

            Comment



            • #7
              Re: Mercury Thunderbolt year?

              Can you guys tell me what the year is of this motor?........
              it's a 650 Merc 4cyl 65 HP.........

              stamped on the motor is: Panther 834-3997................is this the serial ?
              .............................
              and I thought maybe the number in the photo might be the serial # also

              .................................................. ......
              1970 Kiekhaefer Mercury - 650 4cyl 65 hp
              Thunderbolt ignition
              .................................................. ......

              Comment



              • #8
                Re: Mercury Thunderbolt year?

                Can you guys tell me what the year is of this motor?........
                it's a 650 Merc 4cyl 65 HP.........

                stamped on the motor is: Panther 834-3997................is this the serial ?
                .............................
                and I thought maybe the number in the photo might be the serial # also


                [img=http://img515.imageshack.us/img515/3892/dscf1314fd3.jpg]

                [img=http://img465.imageshack.us/img465/1302/dscf1312ju6.jpg]
                .................................................. ......
                1970 Kiekhaefer Mercury - 650 4cyl 65 hp
                Thunderbolt ignition
                .................................................. ......

                Comment



                • #9
                  Re: Mercury Thunderbolt year?

                  Can you guys tell me what the year is of this motor?........
                  it's a 650 Merc 4cyl 65 HP.........

                  stamped on the motor is: Panther 834-3997................is this the serial ?
                  .............................
                  and I thought maybe the number in the photo might be the serial # also






                  .................................................. ......
                  1970 Kiekhaefer Mercury - 650 4cyl 65 hp
                  Thunderbolt ignition
                  .................................................. ......

                  Comment



                  • #10
                    Re: Mercury Thunderbolt year?

                    Originally posted by warpedone View Post
                    Thanks
                    Any Idea where they would have stamped the serial into the block? I've been all over it and haven't seen anything that looks like a serial number.
                    My silver block inline6(s) mid 1960s to 1972 have the serial numbers stamped on the flange from the block the starter motor bolts up too. My later model black block inline6(s) have the serial numbers stamped, (I think on the starboard side, as is the starter is), right next to the place the two halves of the block bolt together. Since you have a blue decal I would suspect the later model, but that is easy to swap (for a different look). Hope that helps. JR
                    A proud n' rare Independent Cornservative from the Seattle Metro area, who runs the finest old black boat anchors money can buy!

                    Comment



                    • #11
                      Re: Mercury Thunderbolt year?

                      Originally posted by compfast View Post
                      Can you guys tell me what the year is of this motor?........
                      it's a 650 Merc 4cyl 65 HP.........

                      stamped on the motor is: Panther 834-3997................is this the serial ?
                      .............................
                      and I thought maybe the number in the photo might be the serial # also






                      The serial number for that 650 is at the base of the powerhead as you face the front of the engine, (not where you are looking), on the clamp between the two screw clamps or on the starter flange on the starboard side of the block. It is likely a 1968-1970 based on the look of the beast. JR
                      A proud n' rare Independent Cornservative from the Seattle Metro area, who runs the finest old black boat anchors money can buy!

                      Comment



                      • #12
                        Re: Mercury Thunderbolt year?

                        Thanks, i found it on the starter flange

                        The serial is 2805901
                        .................................................. ......
                        1970 Kiekhaefer Mercury - 650 4cyl 65 hp
                        Thunderbolt ignition
                        .................................................. ......

                        Comment



                        • #13
                          Re: Mercury Thunderbolt year?

                          Back to the original poster:

                          If your engine has a distributor, it is 1975 or earlier, I think the blue band started 1973 so that puts it in that range.

                          If it has no distributor and one coil per cylinder it is 1976 or newer. Hope this helps.
                          http://www.james.denham.com/myprojects.html

                          Comment


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