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Old 11 February 2022, 09:41   #21
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I think mine weighed 3500kgs with a Yanmar and leg.
I say "think" because I am usually wrong!

But if you know the weight of a single Yanmar, then.....
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Old 11 February 2022, 10:33   #22
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Thx Brian, sound heavy but reasonable compared to the 10m Sport Cruiser that is 3900kg according to an article. What speed did you get with single engine Yanmar 315?
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Old 11 February 2022, 11:46   #23
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Marc Lyne and Deano went round Anglesey at an average speed of 47knts in 2015 in 8.25 Scorpion "Ocean Devil" fitted with 315 Yanmar
We had the pleasure of cruising with Jurgen when he owned the boat ,it was mighty quick
Fast forward will do 40+ knots
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It looks massive on the trailer,but tiny in a big sea!
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Old 12 February 2022, 09:27   #24
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Espen,
I didn't race or aim to go fast, more of a long-range cruiser was my thing.
I used, as a rough rule, to do 3000rpm which gave 30knots at a fuel consumption rate of 30 lph. This was with a Bravo3 leg.
This suited me as I was usually running with myself an 2/3 others, all largish lads. This would give me a (theoretical) range in excess of 450nm which was much more important to me.
On rare occasions it would do 38/39knots.
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Old 12 February 2022, 13:22   #25
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Quote:
Originally Posted by Brian View Post
Espen,
I didn't race or aim to go fast, more of a long-range cruiser was my thing.
I used, as a rough rule, to do 3000rpm which gave 30knots at a fuel consumption rate of 30 lph. This was with a Bravo3 leg.
This suited me as I was usually running with myself an 2/3 others, all largish lads. This would give me a (theoretical) range in excess of 450nm which was much more important to me.
On rare occasions it would do 38/39knots.
Thx Brian, was this with a 9.5 Sports Cruiser and a regular Yanmar 315hp with bravo3?
Thx again for supplying information, so I put a properly powered engine in my vintage' Sports Cruiser.
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Old 12 February 2022, 18:10   #26
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im looking for some pics of the earlier scorpion cabin ribs, i remember a turquoise and a red one..... one called cyanide??

how many of these were made and anyone got any pics? internal and external

ta gt
I'm not sure of the make but there is a large rib with cabin at Albert docks Hull...I think it's abandoned as it's been there for quite some time. If you go on to google maps type in Albert dock and go on to satellite view you can see it to the west tip of the docks...there is a little cut out peice ( looks like jigsaw piece) you will see a white boat and orange boat sat in the quayside ....zoom in and you will see the cabin rib, such a shame to see it abandoned.
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Old 13 February 2022, 09:58   #27
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Espen,
Yes it was a standard 9.75m Sports Cruiser.
I believe it was the last one built as I had to persuade Graham Jelly to build me another one.
It was completed in 2001 just in time for the Round Britain in under 5m (I was the support boat for the event).
It was called Cyanide (because it was the colour cyan).
More detail, photos etc. available if required.
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Old 13 February 2022, 10:06   #28
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Quote:
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Espen,
Yes it was a standard 9.75m Sports Cruiser.
I believe it was the last one built as I had to persuade Graham Jelly to build me another one.
It was completed in 2001 just in time for the Round Britain in under 5m (I was the support boat for the event).
It was called Cyanide (because it was the colour cyan).
More detail, photos etc. available if required.
Thank you so much Brian, yes please images would be great. My spec says Sports Cruiser 9.5, not 9.75 - is there a difference?
Due to your boat speed, my decision is then to go for a Yanmar D-Max of 380hp. Perhaps getting close to 50 knots on a good day early season? What do you think?
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Old 13 February 2022, 10:30   #29
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Thank you so much Brian, yes please images would be great. My spec says Sports Cruiser 9.5, not 9.75 - is there a difference?
Due to your boat speed, my decision is then to go for a Yanmar D-Max of 380hp. Perhaps getting close to 50 knots on a good day early season? What do you think?
Here is a link to the add :
https://www.finn.no/248000819
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Old 09 March 2022, 14:48   #30
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Thanks for all great feedback. I am now considering a different option.
Plan A failed: Yanmar D-Max 380hp will be too fragile to push the Scorpion forward, so the seller adviced me not to go that route.
Pland B is to install an outboard bracket and put a 350 Mercury Verado on my sport Cruiser rather than rebuilding engine compartment to a single Yanmar 315
Any thoughts on speed, Yanmar 315 vs Verado 350?

Again, appreciate all great advice.
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Old 11 March 2022, 00:21   #31
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https://www.finn.no/boat/forsale/ad....kode=248000819
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Old 11 March 2022, 07:14   #32
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Yes, that my boat that I consider rebuilding to outboard
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Old 11 March 2022, 10:31   #33
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My thoughts:
My 315 Yanmar gave 30ltr at 30knots giving a range of over 400nmiles.
Not fast, because I didn't ask for fast, I asked for range.
I had exactly the same build as you.
Therefore, I would have thought that a Yammer 380 would give you more power rather than less.

Second thought is around fuel consumption. A Verado 350 would, I would have thought, consume more fuel per mile. And be petrol. Don't know relative prices but surely your range would suffer.

But why don't you ask Mike Thornton, on here, who has more than one Scorpion?
And ignore my logo on here, that was my second Scorpion.
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Old 11 March 2022, 17:29   #34
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Originally Posted by Espen View Post
Thanks for all great feedback. I am now considering a different option.
Plan A failed: Yanmar D-Max 380hp will be too fragile to push the Scorpion forward, so the seller adviced me not to go that route.
Pland B is to install an outboard bracket and put a 350 Mercury Verado on my sport Cruiser rather than rebuilding engine compartment to a single Yanmar 315
Any thoughts on speed, Yanmar 315 vs Verado 350?

Again, appreciate all great advice.


Possibly worth consideration.
I explored this option for a charter rib that had its inboards removed. It was a 10mtr(ish) rib craft. The result was that because the transom had not been engineered to carry an outboard( from memory no supporting knees and possibly not as thick?). Rib craft quoted me about £3k at the time. Iím sure there are folk would do it cheaper than ribcraft but would insurance agree? Seemed a bit capital intensive for a new(to me) boat so I walked away.
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Old 12 March 2022, 10:36   #35
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I think there sea a red scorpion cabin with twin outboards? I am sure the owner was on here. Possibly twin 200s.

I can’t wait for a diesel and get rid of a petrol boat so wouldn’t go that route. But the outboard is simple and reliable so has its advantages but my fuel burn can be scary
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Old 17 July 2023, 07:50   #36
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Cyanide

Hi everyone I purchased cyanide earlier last year sheís getting a fair amount of time on the water longest trip so far Fleetwood to Largs and back overnight I donít think sheís as quick as she used to be ,Iíve done a few alterations to suit my wife and myself but Iím very impressed with her sea keeping capabilities
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