1936 Johnson Model 100 gearcase seal part# ?

Home Forum Ask A Member 1936 Johnson Model 100 gearcase seal part# ?

This topic contains 5 replies, has 3 voices, and was last updated by Buccaneer Buccaneer 1 month, 2 weeks ago.

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    second wind

    Replies: 3
    Topics: 2
    #175920

    Anyone have a good aftermarket part number for the gearcase seal on a 36′ model 100 1.7hp? Kind of unusual; the brass outer O.D of the seal does not press fit inside the bore of the gearcase seal retainer housing; instead it presses OVER the O.D. of the seal retainer lip.
    I got this little gem a couple weeks ago; cleaned the tank and carb, cleaned, filed and set the points, installed a new spark plug, made some carb needle packing from cork gasket material and added a small “o” ring to the needle shaft for redundancy. I put her in my tank and she fired and ran on the second pull. I used a laser non contact thermometer to keep an eye on the cooling and all was good. Everything in the gearcase looks good just need a new seal and I will be pulling my grandson on his slalom ski in no time! 🙂

    Many thanks!
    Neal

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    2fast4me
    US Member - 1 Year
    Replies: 152
    Topics: 11
    #175935

    Hope to see pictures of your son skiing soon. Sorry no comment about your seal question i haven’t been there yet.

    Buccaneer
    Buccaneer
    US Member - 1 Year
    Replies: 3003
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    #175950

    I had one apart last year, but I neglected to take photos of that section.
    I have run across some strange seals as well.
    Could your seal be a two piece affair, and only half came out?
    I have used cork and packing material where all else fails
    in finding a replacement for these early ones.

    Prepare to be boarded!

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    second wind

    Replies: 3
    Topics: 2
    #176141

    It is a single lip seal. Brass with leather sealing surface. I am going to take it along with the shaft and the housing that it installs on to a bearing and seal shop tomorrow. If I locate one that fits I will post the brand and P/N# here.
    Many thanks
    Neal

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    second wind

    Replies: 3
    Topics: 2
    #176399

    For anyone interested ; C/R (Chicago Rawhide) seal part # 4931 appears to work in this application. I installed and ran in tank today with no leakage issues (so far). I am going to use this for a kicker motor on my 60′ Mahogany Speedliner it is powered by a 56′ RD18 Johnson. I appreciate everyone’s input and plan to become a member soon.
    best regards,
    Neal

    Buccaneer
    Buccaneer
    US Member - 1 Year
    Replies: 3003
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    #176400

    Thanks for the part number, I added it to my notes.

    Prepare to be boarded!

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