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  1. #1

    Default Need Help determining Gearcase size for prop replacement

    First timer here. Thank you in advance for your patience. Need help determining if I have the smaller or larger gearcase for a 1991 Johnson 70hp. I am trying to replace the prop and the hub kit has two options. Small gearcase 3-3/8" or Large Gearcase 4-1/4". any help will be appreciated. Thanks

  2. #2

    Default Re: Need Help determining Gearcase size for prop replacement

    Model number needed to answer.short shaft=small. Long shaft=big

  3. #3
    Join Date
    Sep 2010
    Posts
    19,492

    Default Re: Need Help determining Gearcase size for prop replacement

    I am not sure if there was even a short shaft available in the 1991 model year.------I do not believe there was a small gearcase available for the 91 model year.

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