Wanted Opti 125hp Prop Wanted

whisper · 02 July 2016, 19:27

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

69cmw · 02 July 2016, 19:44

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.

whisper · 03 July 2016, 10:43

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

paulalmond · 03 July 2016, 12:10

Have a High Five 24 pitch available for sale. Let me know if interested.

Pikey Dave · 03 July 2016, 12:46

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

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

Searider · 03 July 2016, 13:34

Mercury Marine Laser II Propeller From 150hp Optimax | eBay

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

Nos4r2 · 03 July 2016, 13:52

Quote:

Originally Posted by Pikey Dave

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.

Nos4r2 · 03 July 2016, 13:54

Quote:

Originally Posted by Searider

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

Dirk Diggler · 03 July 2016, 15:44

Quote:

Originally Posted by paulalmond

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

Dirk Diggler · 03 July 2016, 15:45

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

https://www.mercurymarine.com/en-gb/...ries/laser-ii/

Nos4r2 · 03 July 2016, 15:50

Quote:

Originally Posted by Dirk Diggler

https://www.mercurymarine.com/en-gb/...ries/laser-ii/

Ta

Which ones am I thinking of then?

Dirk Diggler · 03 July 2016, 16:37

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.

paulalmond · 03 July 2016, 19:20

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

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.

whiskylee · 03 July 2016, 20:55

I have a Laser 11 21pitch, £120 + postage if you are interested