Johnson HD 15

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  • March 5, 2024 at 11:46 pm #285563
    Ken Marshman
    Participant

      US Member

      Hello.  New here.  I’ve recently acquired a Johnson HD 15 and I’m wondering if the motor is rebuildable.  The motor spins and does not appear to be missing anything.  I have the motor, tool bag, owner’s manual, and spare prop.   Is there a service manual?

      Ken

      March 6, 2024 at 1:13 am #285565
      John Gragg
      Participant

        US Member

        Hi Ken,

        Everyone here calls this service manual ‘The Bible’. Unfortunately it’s not a free download, but for the $19.98 they ask it’s well worth it.

        In my experience it’s likely someone will offer to get you a copy, so maybe hold tight for a day or two.

        Good luck and welcome.

        Best Regards

        John Gragg
        RIverside, CA

        Just starting in the hobby, please be patient.

        48 Sea King 5hp GG9014A
        49 Sea King 5hp GG9014A
        48 Johnson TD20
        49 Johnson TD20
        54 Johnson QD15
        55 Johnson CD12

        March 6, 2024 at 8:11 am #285567
        crosbyman
        Participant

          Canada Member - 2 Years

          it was on  Garry Spencer’s  list of docs which is no longer available for free download  for members but  what is 20$ these days 🙂

          the file is quite large  the only way would be for a member with a file transfer  like dropbox to provide a link .

          https://watercraftmanuals.com/outboard/johnson/manuals/johnson-302231.htm

          see ex: pages   sorry magneto file is  over 2 meg    this site will not handle >2 meg

           

          before spending $$$ check  compression   head gasket  are cheap but a full rebuild may be $$$$  checkGC  for water  (may need  a reseal) etc….    great hobby  !

          Joining AOMCI has priviledges 🙂

          March 6, 2024 at 8:32 am #285570
          Buccaneer
          Participant

            US Member

            this site has some good basic “how to” tips on those motors…..

            http://pochefamily.org/outboard

            Prepare to be boarded!

            March 6, 2024 at 10:53 am #285575
            seakaye12
            Participant

              US Member

              Ken if you want to PM me your e-mail address I can send you the “Red Book” that these guys are talking about.  It would be sent through a free file transfer service called WETRANSFER.

               

              March 6, 2024 at 12:15 pm #285582
              Ken Marshman
              Participant

                US Member

                Thanks for all the replies.

                I am patient.  I would like to set this unit next to my 25 Evinrude for trolling.

                I will check compression.  What is a good pressure?

                GC will need a seal.  No water just old grease.  Motor was stored indoors and hasn’t been on the water for at least 5 decades.  I know the original owner.  Husband has been gone and wife kept it on a motor cart.  It could really use a paint job.

                I have discovered the Pochefamily site. Thanks

                1.  I don’t know how to PM.
                2.  As a member, is there a way to search the forums without tabbing through the pages?

                Thanks Ken

                March 6, 2024 at 12:28 pm #285583
                crosbyman
                Participant

                  Canada Member - 2 Years

                  some engine run fine at 65-7- sp anything above  isn’t bad  …all depends on wear and TLC  (oil)   given to it

                  GC…. use john deere  corn head grease but  a good  grease clean up won’t hurt .

                   

                  to PM  click on the  destination avatar on the side of page     select  message on the pop up screen     fill in  subject  title  then details    hit send…..done 🙂

                  Joining AOMCI has priviledges 🙂

                  March 7, 2024 at 10:16 am #285621
                  seakaye12
                  Participant

                    US Member
                    Ken Marshman wrote:

                    Thanks for all the replies.

                    I am patient.  I would like to set this unit next to my 25 Evinrude for trolling.

                    I will check compression.  What is a good pressure?

                    GC will need a seal.  No water just old grease.  Motor was stored indoors and hasn’t been on the water for at least 5 decades.  I know the original owner.  Husband has been gone and wife kept it on a motor cart.  It could really use a paint job.

                    I have discovered the Pochefamily site. Thanks

                    1.  I don’t know how to PM.
                    2.  As a member, is there a way to search the forums without tabbing through the pages?

                    Thanks Ken

                    Searching Forums for Members:

                    1. At the Menu above….go to MEMBERS ONLY/ ACTIVE MEMBER FORUM
                    2. Enter your search terms in the field that appears at the upper left of the page.
                    3.  The Similar Search Field that appears on the home page of the site  does NOT search the forums;  just public areas of the site.
                    March 7, 2024 at 11:58 am #285629
                    Ken Marshman
                    Participant

                      US Member

                      Thanks for the search help.  Dave, had set me straight.

                      Ken

                      March 9, 2024 at 10:22 am #285702
                      lloyd
                      Participant

                        US Member

                        70 to 75 psi  is good compression.

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