I have never seen anything above 80 on the limited family of oldies I have worked on and they all ran fine for fishing duties. My mechanical skill level is limited to administering CPR and TLC (…no time to split any open or do a fine painting and decal job like a lot of you folks do.

Maybe not racing duties but for fishing and getting around they are fine motors enjoying a second life..and being enjoyed by their new owners
I have resold (snif snif) a CD , AD, 2 x 9.5 turtles and a 4hp just to recover my basic investment in 50$ motors and parts.

Maybe I have been lucky , maybe my meter is low ( I never tried a second one)