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Old 24 November 2006, 06:41   #1
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Scorpion 7.5 with twin 150hp

Hi,
I'm thinking of purchasing this set up. Does anyone have this or has been on a scorpion 7.5 with twin 150s?
Any ideas on speeds too?
Thanks
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Old 24 November 2006, 07:34   #2
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I have a Scorpion.....
you wont be dissapointed whatever you buy
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Old 24 November 2006, 09:08   #3
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I have a Scorpion 7.5 with 250 horses on the back and 2 x 150 is effectively only a bit more. Top speed is 98 km/hr. Scorpion is a superb boat. It is not the fastest RIB but very secure and safe in rough seas.
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Old 24 November 2006, 09:33   #4
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Thanks guys....I have another question, does 2 engines give the same top speed as one of equal power? eg 2*150 or 1*300?
Perhaps excelleration better but not top speed is my guess! ???
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Old 24 November 2006, 09:42   #5
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No, 2x150 is probably 275 at the most.
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Old 24 November 2006, 09:50   #6
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Two engines is not faster than one, but the security of 2 engines is very appealing, also the handling is far better. If you went for Etec's it would keep the weight down, therefore not losing to much top end.
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Old 24 November 2006, 10:32   #7
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Quote:
Originally Posted by BobLS View Post
Thanks guys....I have another question, does 2 engines give the same top speed as one of equal power? eg 2*150 or 1*300?
Perhaps excelleration better but not top speed is my guess! ???
As a rule of thumb you will lose around 30% or more using two engines, there is also the extra cost in servicing, the fuel consumption will be higher and they will cost quite a bit more to start with - the only real advantages to a twin engined boat are that of redundancy - ie if one breaks the other will get you home - and with modern engine reliability that is becoming less likely (but still worth it if you're in the middle of nowhere), and of course stabilty and manouvrability the you get from two engines.

I reckon you will need two 200's to replace one 300 to get better performance!
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Old 24 November 2006, 14:27   #8
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Scorpion 7.5 speed

We have a Scorpion 7.5 with a 225 Optimax which I guess will give a similar performance. We have a 21 inch three bladed prop and top speed with half a tank is 55mph. You won't be disappointed with the Scorpion's performance.
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Old 24 November 2006, 14:51   #9
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Hi BobLS & welcome to the forum.

You can't go wrong with a Scorpion. However if you are buying new I would suggest you get a comparable cost for an 8.1m with singe engine. The extra length of the 8.1 really does make a difference!

Regards

Ian
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Old 26 November 2006, 13:50   #10
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Twin engines

The Scorp is a great choice. I drive an 8.5m with a 225 Opti, and we've been through some hellish stuff this season, and survived to tell the tale.

But there's many times when I've thought an extra engine would give great peace of mind. I guess a lot depends on how you're going to use the boat.

In most cases an engine failure just means dropping the hook over the side and waiting for a mate to pick you up, but if you're in a F8+ onshore gale you'd be glad of the extra engine.
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