The prop you use is dictated by your hull style more than what is used for. Flat bottom jon boats generally do best with a semi clever blade shape. Even if the hull has a slight v in it they are still considered "flat bottom".
Your tach will give insight on where to adjust. I'd start with the 15 pitch, but perhaps the 16 is best suited. It's a roll of the dice. You really won't know until you put the prop on and go run her.
One thing to consider is that your motor, being a 2 stroke, will produce more power at a higher rpm. The rule of thumb is if you have a prop that pushes your boat well, assuming all other factors equal (manufacturer, model, blade shape, diameter, etc), going up 1" of pitch will reduce rpm by 200. Conversely, going down 1" of pitch will increase by 200rpm. It's not an exact science, just a starting point for some guidance.
Another consideration is if your motor's rev limiter is disabled. If not, you might not be able to go over 6,200 rpm. If you disable it and the best prop you find runs 6,800rpm at wide open throttle then you're golden.
Say you're running down the river with a minimum load at 6,800rpm, then duck season rolls around and you load up the boat with guns, decoys, shells, 2 fat friends, all their gear plus a dog, then next thing you know you're running 6,200 rpm. For comparison purposes, if 6,100rpm is your starting point, in the same scenario you'll be running 5,600rpm and you may find the motor not running like it should.
Either way, it'll be one big science experiment that will require time, money and patience. If you get the right prop the first time around you'll be extremely lucky.
Good luck and may the force be with you.
Sent from my SM-G970U using Tapatalk
[SIGPIC][/SIGPIC]
Delta in a nutshell: Breeding grounds + small wetlands + big blocks of grass cover + predator removal + nesting structures + enough money to do the job= plenty of ducks to keep everyone smiling!
"For those that will fight for it...FREEDOM...has a flavor the protected shall never know."
-L/Cpl Edwin L. "Tim" Craft
Bookmarks