Better prop to troll with?

[Glastrontizz]

I have two props for my 1984 Evinrude 140hp v4. One is a 13 3/4 - 15 and the other is 14 - 17. Which one would be better for trolling for trout? Thanks

 

[steelespike]

Re: Better prop to troll with?

The 15 should produce a slower trolling speed.