Prop question for MJ

[macojoe]

I had a 175 Yamaha and now a 175 Evinrude, I have a hard time on troll, here we like to do 2 mph and I have a hard time getting under 4 mpg.

I have asked before and have been told that maybe the 17 will be better cause it pushes less water then the 15?? so I am going to try with the 17 and see what happens? If I do better then I might put the 17 on when I know I am trolling, and stick with the 15 when I am not??

I Will let you know what happens? I am going to leave the 17 on and I am hopefully going out Sunday, I will troll to see what happens,