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Old 22 January 2016, 13:05   #1
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Yamaha 115 prop recommendation

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!
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Old 22 January 2016, 14:15   #2
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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.
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Old 22 January 2016, 16:15   #3
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Thanks Mat!
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Old 23 January 2016, 05:14   #4
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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!
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Old 23 January 2016, 15:40   #5
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Have 2 boats with 115 yamaha four strokes. Have found that 13 1/4 x 17 is just right.
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Old 23 January 2016, 15:42   #6
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forgot to say 3-blade.
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Old 23 January 2016, 16:07   #7
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Quote:
Originally Posted by hoss View Post
forgot to say 3-blade.
What sort of revs are you thinking of for the yam 115? Max power is at 5500. Nik
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Old 23 January 2016, 22:42   #8
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I run a 13.75" x 15" 4-blade stainless on my aluminum hull Polaris 17.5'.

jky
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Old 26 January 2016, 16:10   #9
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Thanks guys!!
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Old 26 January 2016, 17:01   #10
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Quote:
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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.
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