Where to locate prop size and pitch

[LarryHale]

I have a 1987 Johnson 50 HP with a dinged up prop and would like to change it to gain a bit of top end speed. It's mounted on a 1987 Henry O. Where on the prop can I locate the size and pitch? I've looked everywhere externally and can't find anything.

 

[211libwtfo]

Did you look on the inner circle around where the prop shaft would come through.

 

[LarryHale]

No, I haven't. The cup is pretty gummed up so I guess I'll have to clean it up to check. Thanks for the info.

 

[LarryHale]

Prop size and pitch aren't in the cup either. Anyone else have any ideas?

 

[211libwtfo]

On the prop shaft in between the blades

 

[LarryHale]

Found it on the hub behind the castle nut.

 

[Scott Danforth]

as far as gaining top speed, if your WOT RPM is where it is supposed to be, you need more motor to go faster.