Johnson TN Lower Unit Seals

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  • Steven Moore

    US Member - 1 Year
    Replies: 8
    Topics: 2
    #246804

    I’ve hunted and hunted the forum, but no luck…Does anyone know where I can source the two seals for the lower unit of a Johnson TN? I own a TN26 and TN28 and I would like to re-seal the lower units. The TN26 is getting water in at a fairly fast rate.

    Original part numbers should be: Prop Shaft Seal: 41-62; Upper Drive Shaft Seal: 302302. Am I missing any other seals?

    I was able to source the large o-ring, P/N 302337 for the gearcase head, so I am good there. Thank you MarineEngine.com!

    I did find an old post where I member had seal kits made-up for the Johnson TN, so I’ve sent him a message.

    Thank you very much for any help.

    Steve

    Pg-18-Lower-Unit-Gearcase-4

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    seakaye12

    US Member - 2 Years
    Replies: 692
    Topics: 96
    #246809

    There is a 302302 on ebay right now;
    https://www.ebay.com/itm/164911580527?hash=item26657f056f:g:178AAOSwVnxgxnp9

    or

    https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=302302+seal&_sacat=0&LH_TitleDesc=0&_odkw=18-2032&_osacat=0

    The 41-62 according to my notes is equiv to Sierra 18-2032 or OMC 0307563 or 0321788 or National #471442

    https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=18-2032&_sacat=0

    Verify for yourself before ordering.

    • This reply was modified 1 month ago by seakaye12.
    1 user thanked author for this post.

    Steve Martin

    US Member - 1 Year
    Replies: 82
    Topics: 15
    #246825

    If you can measure the dimensions, you can look up a number in the online CR catalog or the Grainger website. I just sourced seals for another motor from Grainger this week.


    Steven Moore

    US Member - 1 Year
    Replies: 8
    Topics: 2
    #246840

    Seakaye 12:

    Thank you! I just purchased the 302302 on FleaBay.

    The seal that was hard to find was the 41-62 using that number. I will start hunting for the Sierra 18-2032 right away. And/or the other equivalents.

    I very much appreciate your fast reply!


    Steven Moore

    US Member - 1 Year
    Replies: 8
    Topics: 2
    #246841

    Hi Steve Martin:

    I didn’t even know there was a CR catalog. ‘Learning as I go. As the existing 41-62 seal has a CR part number on it of 300599. Bingo! I will start hunting for a CR 300599 or Sierra 18-2032.

    Thank you very much!


    seakaye12

    US Member - 2 Years
    Replies: 692
    Topics: 96
    #246860

    Again looking back on my notes I remember that there may be a formula for converting those old 41-62 type numbers into current stuff.

    First; replace the dash with a zero=41062

    Then, Add another Zero at the beginning to get a 6 digit number 041062

    Then….enter that into a site like marineengine.com and see what you get:

    41-62

    Attachments:

    seakaye12

    US Member - 2 Years
    Replies: 692
    Topics: 96
    #246870

    Your existing Prop Shaft Seal is a CR-30059?

    That’s different from the 41-62 shown in your Gale diagram.

    A CR-30059 is equiv to a Sierra 18-2035

    182032

    Attachments:

    Mumbles

    Canada Member - 2 Years
    Replies: 5171
    Topics: 276
    #246873

    Chris at myoldoutboardmotor lists seal kits for the TD and TN motors. It might be worth trying to contact him.

    http://www.myoldboatmotor.com/home.html

    http://www.myoldboatmotor.com/gearcase-seal-kits.html


    Steven Moore

    US Member - 1 Year
    Replies: 8
    Topics: 2
    #246875

    My mistake! I’m working on my 1952 Johnson TN28, my 1950 Johnson TN26 (the one that needs the seals) and my 1952 Evinrude Lightwin simultaneously. I mixed up the CR seal number from the Lightwin. . . Thank you for correcting me!

    Your existing Prop Shaft Seal is a CR-30059?

    That’s different from the 41-62 shown in your Gale diagram.

    A CR-30059 is equiv to a Sierra 18-2035

    182032


    Steven Moore

    US Member - 1 Year
    Replies: 8
    Topics: 2
    #246876

    I will definitely reach out to him Monday. I did send a PM to him through this forum, but I will order through the web site Monday. Thank you got your help!

    Just as an FYI, I belong to a couple other special interest type clubs with forums. Two of the clubs post cross references on OEM Part Numbers to modern equivalent. That makes it super easy to find parts, especially when in a hurry. I realize there are hundreds of varieties and years of Antique Outbiards, but it’s some thing we might want to think about. Not all catalogs such as Sierra go back far enough in time to figure out modern part numbers. Might be something the senior members could help us junior members learn.

    Chris at myoldoutboardmotor lists seal kits for the TD and TN motors. It might be worth trying to contact him.

    http://www.myoldboatmotor.com/home.html

    http://www.myoldboatmotor.com/gearcase-seal-kits.html

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