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02 July 2016, 18:27
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#1
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Opti 125hp Prop Wanted
Hi, My Ribcraft 585 will be running an optimax 125hp, off the top of my head I reckon it will need about a 21" pitch prop? However I'm going to be running a 6" standoff bracket...
I have a 15" & 17" but would like a 19" or 21" prop.
Thanks Alex
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02 July 2016, 18:44
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#2
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Member
Country: UK - Scotland
Make: Humber Ocean Pro
Length: 3m +
Engine: Yam 200HP
Join Date: Jul 2009
Posts: 986
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Opti 125hp Prop Wanted
My mate has the same engine on a 5.7 or 5.8 Humber Ocean Pro, also running a 6 inch set back jack plate, his over revs with a 19" pitch, he reckons a 21" should sort it.
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03 July 2016, 09:43
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#3
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Yeah, having run a 585 with a 140 suzuki which kicks out the around the same hp as the 125 Opti I reckon I'm looking for any of the following to have a good test to see where my revs are:
21" Ali 3 blade
20" Ali 4 blade
20" SS 3 blade
19" SS 4 blade
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03 July 2016, 11:10
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#4
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Member
Join Date: Nov 2014
Posts: 18
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Have a High Five 24 pitch available for sale. Let me know if interested.
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03 July 2016, 11:46
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#5
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,109
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Quote:
Originally Posted by whisper
Yeah, having run a 585 with a 140 suzuki which kicks out the around the same hp as the 125 Opti I reckon I'm looking for any of the following to have a good test to see where my revs are:
21" Ali 3 blade
20" Ali 4 blade
20" SS 3 blade
19" SS 4 blade
![thumbs up](https://www.rib.net/forum/images/smilies/thumbs.gif)
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Interesting comment about the power outputs of the DF140 v Opti. Which way do you reckon it goes? Is the Suzuki under delivering or is the Opti kicking out more than 125?
Lions led by donkeys
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Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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03 July 2016, 12:34
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#6
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Member
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,069
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Mercury Marine Laser II Propeller From 150hp Optimax | eBay
Not quite "Excellent condition" but would be OK as a tester. If it was cheaper.....
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03 July 2016, 12:52
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#7
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Quote:
Originally Posted by Pikey Dave
Is the Suzuki under delivering or is the Opti kicking out more than 125?
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Internet rumour is DF140s underdeliver. Rumour has it that they only just fall into the +/-10% needed to be called 140hp. So it must be true
Whether that's true or not, the Opti is still 15kg lighter and given that it's a 2 stroke, should be quite a bit more torque to play with.
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03 July 2016, 12:54
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#8
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Quote:
Originally Posted by Searider
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Doesn't fit.
From memory, with Laser props, even number pitch fits the inline optis, odd # pitch fits the V6s
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03 July 2016, 14:44
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#9
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
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Quote:
Originally Posted by paulalmond
Have a High Five 24 pitch available for sale. Let me know if interested.
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High 5's only fit 135+ hp outboards (and Alpha & Bravo s/d's). I think it's because a 125 gearcase is a smaller diameter
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03 July 2016, 14:45
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#10
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
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Quote:
Originally Posted by Nos4r2
Doesn't fit.
From memory, with Laser props, even number pitch fits the inline optis, odd # pitch fits the V6s
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https://www.mercurymarine.com/en-gb/...ries/laser-ii/
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It is better to remain silent and be thought a fool, than to speak and remove all doubt!
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03 July 2016, 14:50
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#11
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,067
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Quote:
Originally Posted by Dirk Diggler
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Ta
Which ones am I thinking of then?
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03 July 2016, 15:37
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#12
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Member
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
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Dunno, I'm a bit out of touch with the latest Merc props. I only use Mirage and Bravo 1's. Mirage are odd pitch size, B1's are even.
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It is better to remain silent and be thought a fool, than to speak and remove all doubt!
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03 July 2016, 18:20
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#13
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Member
Join Date: Nov 2014
Posts: 18
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Quote:
Originally Posted by Dirk Diggler
High 5's only fit 135+ hp outboards (and Alpha & Bravo s/d's). I think it's because a 125 gearcase is a smaller diameter
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Not sure about that. From the spec sheet
HI-5 (V-4) -- These propellers have a 2" progressive pitch and a parabolic rake of 30 degrees. Used on the 75 through 150 HP outboards and XR4 series.
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03 July 2016, 19:55
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#14
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Member
Country: UK - England
Town: Abersoch
Boat name: vanishing point
Make: phantom, Ribtec
Length: 6m +
Engine: 200hp
Join Date: Nov 2014
Posts: 495
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I have a Laser 11 21pitch, £120 + postage if you are interested
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