1977 70 johnson prop choice

[triparacing]

mounted on 16' 50" tunnel jon boat. need to replace prop. The one on it now is 13 3/8 17. dont have tach. Seems to rev hi and cavitate somewhat.Would I be better with cupped 13 1/4 19 ? Any help would be greatly appreciated!

 

[Silvertip]

Re: 1977 70 johnson prop choice

Without a tach and speed measurements its not possible to determine what's best.

 

[JB]

Re: 1977 70 johnson prop choice

Prop topic.