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Old 03 January 2007, 07:43   #1
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150 Optimax Prop

I'd be interested to hear what pitch propeller people are using on the 150 Optimax fitted to RIBs around 5.5 - 6.0 m.
I've seen a few threads on here which suggest the 19" LaserII and others in favour of the 21" version.
If anyone has experience of both, it would be great to hear how they compare.
Also, if any other varieties are used, eg Vengeance, Solas, etc., what sort of performance do you get from these as a comparison with the Laser II?
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Old 03 January 2007, 11:08   #2
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19'' Laser 11 fantastic no cavitation at all though it just short of max revs at WOT
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Old 03 January 2007, 11:27   #3
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I found a 23p 5 blade so much better than the 3 blade, in my particular case
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Old 04 January 2007, 05:41   #4
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I ran a 19" laser II on a Viper 5.75 with a 150 opti, very good match!
But I think it was the Vengeance that Julie at steel developments advised as it would give more lift to the stern, if I remember right!
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Old 04 January 2007, 11:21   #5
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my 6.5 vipermax 150 opti ran better on 21 pitch,Laser2
tryed 19 reved to much for my liking, sounded good tho , with out good load on boat, where as 21P 4 up 200.00 fuel
43 notts if i remember correctly. phil chitty can confirm if i am wrong,
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Old 07 January 2007, 15:03   #6
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I did 100's of hours on 6,5 Scorpion with a 150 happymnax usually with 6 up and the 19 laser 11 worked just great! I ran the 21 for a while but didn't notice enough fuel saving to say goodbye to the 19's holeshot.

Your boat will be stunning with a 19 which I think comes as standard
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Old 07 January 2007, 15:31   #7
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Laser 2 is an outdrive prop. The Vengeance is a large capacity O/B prop. Dai has no mates so he could probably get away with a 23P Vengeance which could get him near the 50knt mark.
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Old 07 January 2007, 17:59   #8
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Originally Posted by Mollers View Post
Laser 2 is an outdrive prop. The Vengeance is a large capacity O/B prop. Dai has no mates so he could probably get away with a 23P Vengeance which could get him near the 50knt mark.
I may have no mates, but I'm the weight of 3 blokes, so I'll go for either the 19" or 21".

Mollers: what pitch was that old Vengeance prop lying around in your shed? How did that one perform on your boat?
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Old 08 January 2007, 03:07   #9
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I may have no mates, but I'm the weight of 3 blokes, so I'll go for either the 19" or 21".

Mollers: what pitch was that old Vengeance prop lying around in your shed? How did that one perform on your boat?
It's a 19". need to re-hub it though. I stripped the hub on the Laser 2 and swapped them. You're welcome to try it and the 21" Laser2. The Vengeance is gonna go back on for the Channel Isles trip.
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Old 09 January 2007, 08:49   #10
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It's a 19". need to re-hub it though. I stripped the hub on the Laser 2 and swapped them. You're welcome to try it and the 21" Laser2. The Vengeance is gonna go back on for the Channel Isles trip.
Wish I was a bit nearer you lot that sounds the business.
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