choosing the right prop

[jacheru]

HI can someone help me choosing the right prop???
i havea bass boat with evinrude 175 e-tec motor with a 14-1/2 x 20 prop, with 4000 rpm runs 37mph, i want to change it for a turbo lightning prop but i don't know who is the best a 14-3/4 x 25" or 14-3/4x27"
thanks

 

[steelespike]

Re: choosing the right prop

What is the wot rpm with the 20" prop?What brand,size and weight bass boat?
A 25" prop will lower rpm "about" 1,000,a 27 "about"1,400.

 

[jacheru]

Re: choosing the right prop

the wot is 4500rpm, the boat is a stratus model 1500, weight i'm don't know maybe 900lbs, the size is 15 feet longer.
I never put 4500rpm, i put 3500rpm, but i want to go faster...
put 27 can makes my boat go faster?

 

[steelespike]

Re: choosing the right prop

You should read the stickies at the top of the page and the helps at the prop store page.We will be glad to answer any questions.
Your motor needs to be able to operate at its max. wot
rpm 5,850.You need to select a prop to put the motor near the 5,850 A 27" would lower the rpm "about"1400.Your 20"I would expect it to over rev.Either your tach is wrong or the motor/setup has a problem.Once you have the correct max wot rpm you can run at what ever rpm you prefer.

 

[jacheru]

Re: choosing the right prop

thanks for helping me