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Need Help determining Gearcase size for prop replacement

Bobander$9

New member
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
 
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.
 
it I 100% the large case known as 4 1/4, but its not realy that big, its more like a fraction over 4 inch.
last of the small case was 1988 model 75hp . ( although these actually stopped being made in 1986.)...
 
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