How to Measure an Inboard Prop Shaft Diameter Without Calipers

[@mustafamd6019]

Is Pi value is 22/7 or 3.141 ...what to consider

[@scottydntno]

you smart SOB lol thanks

[@tonymott3684]

So simple, it’s basically 3.14... times more accurate than measuring the shaft directly - why didn’t I think of that?!