Yamaha F90 on Dominator 165 Sport - What Prop?

[Bigstorm]

I just got this boat over the weekend and need to get a spare prop for it. The prop on there now is 13X19. The Alumacraft website has a performance sheet of this boat/motor/prop and it looks OK but I have a question. The sheet shows that at 1000rpm, the boat is moving 3.7mph. Granted I havent had the boat out to play around yet so I dont know how low the RPM's actaully go, but I was hoping that I would be able to go at 2mph to 2.5mph at idle for trolling.

I'm not concerned with top speed (sheet shows top speed of 39mph at 5900rpm with this combo) as I wont run it wide open very often. I prefer to run it slow enough just to keep it on plain or slightly faster. I'm never in a rush and would rather save on fuel. During the test drive it seemed like this boat/motor/prop combo would stay on plain at around 20mph.

Is there a better prop pitch that would work or should I stick with the stock size on this?

[propmann]

Originally Posted by Bigstorm

I just got this boat over the weekend and need to get a spare prop for it. The prop on there now is 13X19. The Alumacraft website has a performance sheet of this boat/motor/prop and it looks OK but I have a question. The sheet shows that at 1000rpm, the boat is moving 3.7mph. Granted I havent had the boat out to play around yet so I dont know how low the RPM's actaully go, but I was hoping that I would be able to go at 2mph to 2.5mph at idle for trolling.

I'm not concerned with top speed (sheet shows top speed of 39mph at 5900rpm with this combo) as I wont run it wide open very often. I prefer to run it slow enough just to keep it on plain or slightly faster. I'm never in a rush and would rather save on fuel. During the test drive it seemed like this boat/motor/prop combo would stay on plain at around 20mph.

Is there a better prop pitch that would work or should I stick with the stock size on this?

I would get a 17 pitch this way you have 2 different sizes incase you have a boat full of people and gear it would be easier to plane out.

[Bigstorm]

So a 13x17 would get me more power out of the hole, would it make it go a little slower at idle and also top end?

Thanks for the help on this, I dont know much about props. I will send you a PM with a few other questions