PROP

[booboo]

How much difference does a performance?? prop make on an outboard? I have a 150 4stroke on my 21' nautic, right now it has a 3 blade prop on it, not sure of the pitch. Would changing it out make a difference??? thanks

[Dink]

Numbers?? Rpm and speed at WOT?

[evis102]

The right prop makes all the difference and the chances of your boat coming from the dealer with the right prop are very low.

[booboo]

45 mph @ 5600 rpm

[Dink]

What engine?

[PUREBAY2200]

Ur prop is to big.... U should b Gettin 5600 with wot and 52 mph with a light load.
That's from yamaha performance bulletin.
Now it's not precise and accurate for every boat , but it's close.
14 1/2 x 21 pro series prop

[Montauk17]

Originally Posted by PUREBAY2200

Ur prop is to big.... U should b Gettin 5600 with wot and 52 mph with a light load.
That's from yamaha performance bulletin.
Now it's not precise and accurate for every boat , but it's close.
14 1/2 x 21 pro series prop

Read the test load 1/2 tank of gas,one battery,no trolling motor or ice. Every application is different. What brand of 150 are you running? If it is a four stroke you need to be close to 6,000 rpm's at wide open.

[PUREBAY2200]

I know...... Lol
That's y I said it's not exact but close.
Just a thing to look at as a gauge.
And I included " with a light load"

See I covered all the in's and outs.

I was suprised to see only 5600 rpm..... Bro n law has a 22xbay express with a 150 Yammy 4 stroke.
It'll hit 6000 when I blow the prop out the water.
5800 is the wot & with a full load for a day of fishin it'll run 46-47 mph
Lite load for an afternoon trip.... 51

[specknation]

I had that exact boat with a 150 Yam 4 stroke , with 2 people 3/4 tank of gas trolling motor etc... 5600 49.7 any thing less than that weight put me over 50 I had the yamaha pro series 21 pitch.