The right prop for my boat

[mav6759]

I have a evinrude 155-hp, I just got the motor and don't know what prop to use with the boat. Here is the infor I have for the boat. The boat is a 1989 21 foot stratos bass boat, from what I read the motor turns between 4500 to 6000 RMP's, I fish alone 99% of time but I do have a second person in the boat from time to time. Don't Know any help would be great.

Thanks Mav

 

[175se]

Re: The right prop for my boat

operating rpmfor that motor shows 4500 to 5500 rpm, (mine likes 5700 that's mine) run at full throttle, trimmed out see what rpm it turns, then prop from there. 1 inch of pitch on prop will change rpm approx. 250-300, Increasing pitch lowers rpm while decreasing pitch increases rpm.

 

[mav6759]

Re: The right prop for my boat

What size prop are you running on your, just wanted to get a starting point.
Thanks
Mav

 

[175se]

Re: The right prop for my boat

I run a 20 due to my boat weight and such.

 

[mav6759]

Re: The right prop for my boat

So, the heavier the boat the more pitch main is right around 1468 with a full load, What dia are you using

 

[175se]

Re: The right prop for my boat

14-1/2

 

[Faztbullet]

Re: The right prop for my boat

The early Stratos 201 are heavy and with that motor you should be running a prop around 19 pitch with fuel tanks 1/2 full