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Old 22 September 2006, 07:08   #1
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Scorp 7.5m + suzuki 300??

Thinking of the above set up. Has anyone ever put a single 300 yamaha on one or another 7.5 Rib? Or is it too much? speed is the key on this one.

Or has anyone thort of this idea and come up with any floors i.e scorp recomending that 300hp is to much for the hull???

Saw the new Suzuki 300 yesterday at the boatshow, it looked v.cool, as do all Suzuki's.

comments would be most helpfull.

Nick
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Old 22 September 2006, 10:24   #2
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250 is the recommended maximum.... what sort of speed do you want?
http://www.scorpionribs.com/7.5m.html
You would probably be better off with an 8.1 if you want to use a 300hp engine
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Old 22 September 2006, 10:51   #3
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Ok. well 60kts was our goal. does anyone know what it would go like with a 250? I think the 8.1 is a bit big to trailer on our small roads here in Jersey.
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Old 22 September 2006, 14:20   #4
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Scorpion 7.5 with Evinrude 250 DI 98 km/hr = 60,8 mph = 52,9 kn.
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Old 22 September 2006, 14:44   #5
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Mark M - Nice pictures where were they taken

Mark

Two nice action shots - what location?

Paul
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Old 22 September 2006, 14:47   #6
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Added another two.
This is in the north of Holland, the IJsselmeer.
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Old 22 September 2006, 15:13   #7
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Quote:
Originally Posted by nick wood
Ok. well 60kts was our goal. does anyone know what it would go like with a 250? I think the 8.1 is a bit big to trailer on our small roads here in Jersey.
Nick,

The Scorpion hull is not as fast as some of the competiotion (like Revenger) good sea keeping is their strong point. From memory a 7.5 with 200 Fichct E'rude achieved 55 knts when we tested one last year. You may achieve your goal with a 300hp, but if Scorpion say it's too much power they probably know what they are talking about.

In my experience the 8.1m is much better in tricky sea conditions than the 7.5m, but I understand what you say about trailing.


An 8.1m with stepped hull & a 300hp could be the answer to your quest, but it's not cheap

Regards

Ian
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Old 22 September 2006, 16:41   #8
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Went on the Deauville cruise last week and i can only confirm that the sea keeping of the scorpion was as good as i think you can get.
As for speed, doing the Channel showed me that its not all about 60 knts
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Old 23 September 2006, 15:22   #9
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RIBase
300 Promax

When I was lookig for my boat a couple of years ago there was a 7.5 Scorpion with a 300 promax for sale - so it has been done!
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Old 23 September 2006, 18:42   #10
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Scorpion are pretty helpful people, why not simply ask them for their thoughts on this and explain your reasons, I am sure its a simpler way to get an accurate answer..
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Old 24 September 2006, 13:53   #11
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Thanks every one 4 ur input , ok i understand speed is not all key but it helps, I will talk to scorpian this week, nice to hear some one has already put a 300 on a 7.5, but will take in to account about the 8.1 being a better seaboat.

will let u no how i get on.

Cheers, Nick
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Old 24 September 2006, 16:12   #12
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Hi Nick,

We have two 8.1 with Suzuki 300 ordered, so yes have spoken at length to GJ about it and should be a good set up.

If i can help anymore give me a call.

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SM

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Old 26 September 2006, 10:14   #13
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Quote:
Originally Posted by nick wood
Thinking of the above set up. Has anyone ever put a single 300 yamaha on one or another 7.5 Rib? Or is it too much? speed is the key on this one.

Or has anyone thort of this idea and come up with any floors i.e scorp recomending that 300hp is to much for the hull???

Saw the new Suzuki 300 yesterday at the boatshow, it looked v.cool, as do all Suzuki's.

comments would be most helpfull.

Nick
Hi Nick,

If you are looking for alternatives we have a Verado 250 on a BananaShark 770 doing 65mph (nearly 60 knots) and are confident that it would handle a 275 Verado or even an XS300 if you wanted even more speed!
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Old 27 September 2006, 12:44   #14
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im sure in old brochures from scorp 300hp used to be the max for 7.5m but i may be wrong! ill look it out. Viewed boat with promax too and it didnt show any signs of stress but graham did turn his nose up at it when i mentioned it
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Old 27 September 2006, 13:47   #15
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im sure in old brochures from scorp 300hp used to be the max for 7.5m but i may be wrong! ill look it out.
I'm sure it would be ok with the weight of a modern 300 hp, but the current max recommended hp is 250.

Lymington Marine Sales have an 8.75 with twin 275 Verados for sale at present. Although the max hp for that hull is 2 x 300 I would think that those Mercs must weigh much more than a pair of 300 Yams, so there is a bit of lea way. Mind you, at 280 litres per hour WOT speed comes at a price

Cheers

Ian
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