1989 30 hp prop size help

[WesternStar169]

I'm trying to find out what size of prop I should be using for my 1989 30hp Johnson outboard it's on a 16ft aluminum fishing boat. Is any one able to help?

 

[pootnic]

Re: 1989 30 hp prop size help

Ballpark...somewhere around a 12 pitch.
A lot of questions not answered,will effect the proper prop.

 

[steelespike]

Re: 1989 30 hp prop size help

If you get us your present prop size (under the prop nut). And your wot rpm and gps speed.
along with your typical load and activities.
As Pootnic suggests a 12" should work but disregards your setup,load and activities.