Reply
 
Thread Tools Search this Thread
 
Old 02 July 2016, 14:27   #1
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
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
__________________

__________________
whisper is offline   Reply With Quote
Old 02 July 2016, 14:44   #2
Member
 
Country: UK - Scotland
Make: Destroyer 5.5/Ring18
Length: 3m +
Engine: Yam 90HP/Yam200HP
Join Date: Jul 2009
Posts: 447
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.
__________________

__________________
69cmw is offline   Reply With Quote
Old 03 July 2016, 05:43   #3
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
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

__________________
whisper is offline   Reply With Quote
Old 03 July 2016, 07:10   #4
Member
 
Join Date: Nov 2014
Posts: 18
Have a High Five 24 pitch available for sale. Let me know if interested.
__________________
paulalmond is offline   Reply With Quote
Old 03 July 2016, 07:46   #5
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,596
RIBase
Quote:
Originally Posted by whisper View Post
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




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
__________________
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: See rule#5
Pikey Dave is offline   Reply With Quote
Old 03 July 2016, 08:34   #6
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,894
RIBase
Mercury Marine Laser II Propeller From 150hp Optimax | eBay

Not quite "Excellent condition" but would be OK as a tester. If it was cheaper.....
__________________
Searider is offline   Reply With Quote
Old 03 July 2016, 08:52   #7
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Quote:
Originally Posted by Pikey Dave View Post
Is the Suzuki under delivering or is the Opti kicking out more than 125?
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.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 03 July 2016, 08:54   #8
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Quote:
Originally Posted by Searider View Post
Mercury Marine Laser II Propeller From 150hp Optimax | eBay

Not quite "Excellent condition" but would be OK as a tester. If it was cheaper.....
Doesn't fit.

From memory, with Laser props, even number pitch fits the inline optis, odd # pitch fits the V6s
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 03 July 2016, 10:44   #9
Member
 
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
Quote:
Originally Posted by paulalmond View Post
Have a High Five 24 pitch available for sale. Let me know if interested.
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
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Dirk Diggler is offline   Reply With Quote
Old 03 July 2016, 10:45   #10
Member
 
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
Quote:
Originally Posted by Nos4r2 View Post
Doesn't fit.

From memory, with Laser props, even number pitch fits the inline optis, odd # pitch fits the V6s
https://www.mercurymarine.com/en-gb/...ries/laser-ii/
__________________

__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Dirk Diggler is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 23:38.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.