Johnson TN Lower Unit Seals

[Steven Moore]

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

[seakaye12]

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 2 years, 7 months ago by seakaye12.

1 user thanked author for this post.

Ralph Bankmann

[Steve Martin]

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]

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]

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]

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:

[seakaye12]

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

[Mumbles]

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]

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!

seakaye12 wrote:

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

[Steven Moore]

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.

Mumbles wrote:

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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