Yamaha 115 prop recommendation

[openhelix]

I have a Zodiac hurricane 590 (19') and I know the current prop on the outboard isn't optimal. It was former DFG boat and they said they threw a random prop that fit on it before I bought it...

According to the Yammy performance bulletins 13.5" x 19 pitch seems to be about right... Maybe a touch more pitch.
http://yamahaoutboards.com/sites/def...6sf-115tlr.pdf

http://yamahaoutboards.com/sites/def...6xt-115tlr.pdf

Obviously neither of these were tested on RIBs so wanted to get a more accurate opinion here. TIA!

[MatFromPoland]

You have deep V hull.
The first test with 19" is for deep V boat

Second is for bass-boat (probably not V deep).
Such type of boat plans more easier.
23 for ZODIAC 590 is too much I think

I have V-deep RIB 5,4 and 115 HP Evinrude. 19" VIPER is optimum for me.
4 blades 20" (spare ALU prop) has sometimes problem when heavy loaded.

[openhelix]

Thanks Mat!

[Nick Hearne]

I have a Yam 13X19 K ally prop on my 6m rib and it is spot on although if flat and very lightly loaded it can over rev, just!

[hoss]

Have 2 boats with 115 yamaha four strokes. Have found that 13 1/4 x 17 is just right.

[hoss]

forgot to say 3-blade.

[matata]

Originally Posted by hoss

forgot to say 3-blade.

What sort of revs are you thinking of for the yam 115? Max power is at 5500. Nik

[jyasaki]

I run a 13.75" x 15" 4-blade stainless on my aluminum hull Polaris 17.5'.

jky

[openhelix]

Thanks guys!!

[office888]

Originally Posted by hoss

Have 2 boats with 115 yamaha four strokes. Have found that 13 1/4 x 17 is just right.

This.

It's the sweet spot on most boats around 6 meters length.

[lukewhiting]

I had a 17ft fletcher with a yam 115

That used a 19p stainless steel k series prop.

At 5500rpm I could hit 56mph and was still great for pulling wakeboards and ringos.