QD-18 seal kits

[orbanp]

Hello Everyone,

I am about to replace the gear case seals in my '57 10HP Johnson. (Serial#: 242xxx)
I have seen here offered Sierra an Mallory seal kits for that particular motor.
I am wondering about the replacement seals.
The original seals have about a 1/4' - 1/2" sealing widths. The contemporary seals only have about 1/8" of width where the seal is in contact with the shaft. Such new seals are usually used in pairs, mounted back to back, as in the newer motors.

Does anyone know what kind of seals do those kits contain? Do I need to use OEM seals?

The propshaft seal has an OMC part number 302545.
The driveshaft seal has an OMC part number 41A62. Interestingly, the BRP dealer could not find that, he said that it is not a valid OMC number?
The seals in my motor look original, the above seal numbers are stamped into them, and the '57 Evinrude part catalog also has those numbers.
I also understand that the '58 - '63 18HP motors have the same gear case as my QD-18 and same seals. That would give a "valid" number of 307563 for the driveshaft seal that was since superseded. Is that correct?

Any words of wisdom about selecting replacement seals?

Thanks, Peter

 

[HighTrim]

Buying individually through dealer will cost you much more. I would buy a kit.

 

[F_R]

41A62 = 41-62 = 004162 = 307563 = 321788 (or Sierra 18-2032). Your BRP guy would know that if he were as old as I am.

 

[orbanp]

Thanks for the replies and clearing up the part numbers!

Any comment on the seal width?
The propshaft seal on this page <http://www.*****************/parts/johnson-evinrude-parts.php?year=1962&hp=18&model=FD-16&manufacturer=Johnson&section=Gearcase+Group>, item 40, the factory seal looks like a pedestrian oil seal with stamped steel housing, while the Sierra version looks like to have wider rubber sealing area and brass housing.

PS. The add link feature truncates URL, only the main page is shown.
It looks like as if I wanted to add pictures?
Is this a bug in the system?
In any event, you need to combine that link with the one that is shown between the <> characters above.
That one I added into the text, but there the main page is blanked out.

Thanks, Peter

 

[HighTrim]

The OEM/NOS seals are about twice as wide. It is hard to find the .25" width aftermarket. Will still work fine.