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Old 02 August 2011, 13:18   #1
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Delta 6.5m 1991

Hi

Who knows their Delta Ribs...
These boats usually had twins on the back. what HP was normal and engine weight also?
If a single were fitted, what is the max the boat/engine is rated for?
I am guessing that a single 150 or maybe a 175Hp would about be max for this.

Thanks
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Old 03 August 2011, 03:12   #2
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For what it's worth in the very early days Delta used to buy bare Humber hulls & fit them out before they started building their own. Mine is one of those early boats (and has both makers' plates on the transom!)- When I phoned Delta to ask much the same question after the Yam packed up they were really helpful. (A gent called Charles was who I talked to)

5 mins on the phone or an email to Delta will probably answer that question conclusivley.
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Old 03 August 2011, 05:55   #3
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Quote:
Originally Posted by Paul Beaurain View Post
Hi

Who knows their Delta Ribs...
These boats usually had twins on the back. what HP was normal and engine weight also?
If a single were fitted, what is the max the boat/engine is rated for?
I am guessing that a single 150 or maybe a 175Hp would about be max for this.

Thanks

the transom of my (6.8 m) delta is 55 mm or so, however for our inboard diesel to ultra long single 250hp 4 stroke we are making 2 struts from the inner side of the transom forward to support the engine/weight of engine, just to be on the 'save side'. I reckon the transom would sufficiently support the engine anyway....

I know that one of the private lifeboats organisations in the netherlands ('t span - andijk) have a delta 8.9 m who had some problems with a twin 4 stroke setup which turned out to be too heavy for the transom but i understood that was because they had put 2 x max horsepower for 2 stroke engines (lighter) as 4 stroke engines (= much heavier) on the back..I noted that boat also has a strut going forward for support nowadays.

reckon delta themselves are able to tell you indeed ....
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Old 03 August 2011, 11:22   #4
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I have a 1992 6.5x hull fitted with 2x 90hp Honda fourstrokes and used to run a 6.5x with a Yamaha 250vx on it.
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Old 03 August 2011, 12:27   #5
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this is the starting point

Thanks guys
This is what we have to start with....
Paul
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Old 03 August 2011, 12:34   #6
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North West Trading Company (Aberdeenshire) were selling a couple of early 90's 6.5m Deltas (one sold, one still available), and they said 60-90hp for twin outboard set-up. Details here: RIB Boat for sale at findafishingboat - FAFB

I see you bought one!
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Old 03 August 2011, 12:48   #7
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OK not engine size but is this any help?
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Old 30 August 2011, 04:43   #8
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Delta 6.5x

Most 6.5x models came with twin 60's or 90's.

I am envious that you got to buy this boat. I work for Sea Shepherd and we have the same model, and when i saw this boat on the market, I immediately dreamed of the perfect project RIB, to tailor the most reputable hull into a great oceangoing rib.

We have a 6.6x model which originally had twin yamaha 90's, but were replaced in 2008 with twin optimax 90's. Due to the increase in size and weight we ended up having to shift the console and seating forward to balance out the weight. The Twin optimax 90's are pretty heavy. We also have a two person full console with a reserve underneath which really helps as ballast. This single rescue console may need a bit more up forward if you were thinking about twin 90's.

You dont see Deltas with single engines often, but I have seen single 4stroke 150's which appear to be fine. They recommend no more than 180hp.

Best of luck with that refit.
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Old 30 August 2011, 13:41   #9
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I've a 6.5 delta wich was originally fitted with 2x 60hp's.
I fitted a single 250 evinrude ficht, and it did 52 knts with that engine before it broke down.
The 250 was to big, on top speed the hull got lifted so high out of the water it would lean to port side!
Then i fitted a single 200 hp yamaha hpdi, wich was perfect. Did 42 knts
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Old 30 August 2011, 14:00   #10
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I've got a Honda 224hp if that's any good ?

Peter
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Old 30 August 2011, 14:28   #11
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I can see a nice pair of 90 E-tec's hanging on the back of that Paul ;-)
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Old 30 August 2011, 15:05   #12
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I can see a nice pair of 90 E-tec's hanging on the back of that Paul ;-)
Nah! 115's then you can go CR
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Old 30 August 2011, 16:34   #13
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Hmm yes I concur a much better plan all round if the transom can take the strain....
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Old 31 August 2011, 03:00   #14
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How about a couple of Yamaha 100hp 4-strokes? Too heavy at 170kg each? West Wales Yamaha Marine : Outboards : Chandlery : Servicing : Boat Packages : Neyland : Pembrokeshire

Still a Yamaha 90hp 2-stroke here... that's one down one to find!
Outboard Marine Services
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Is that with or without VAT?
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Old 31 August 2011, 04:17   #15
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Originally Posted by SeaShepherdDelta View Post
We have a 6.6x model which originally had twin yamaha 90's, but were replaced in 2008 with twin optimax 90's. .
What was wrong with the Yamahas? Fishery patrol ribs usually seem to use Yam 2 strokes so I guess they are well regarded.
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Old 31 August 2011, 09:03   #16
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Originally Posted by spartacus View Post
How about a couple of Yamaha 100hp 4-strokes? Too heavy at 170kg each? West Wales Yamaha Marine : Outboards : Chandlery : Servicing : Boat Packages : Neyland : Pembrokeshire

Still a Yamaha 90hp 2-stroke here... that's one down one to find!
Outboard Marine Services
Price shown is per engine at 163;6665.00 plus VAT. Price for the two engines is 163;13330.00 plus VAT

HOW MUCH!!

I guess the rendering of the "" symbol is screwy and should be 6665.00 and 13330
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Old 01 September 2011, 00:45   #17
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Quote:
Originally Posted by Humber95
I've a 6.5 delta wich was originally fitted with 2x 60hp's.
I fitted a single 250 evinrude ficht, and it did 52 knts with that engine before it broke down.
The 250 was to big, on top speed the hull got lifted so high out of the water it would lean to port side!
Then i fitted a single 200 hp yamaha hpdi, wich was perfect. Did 42 knts
How heavy was your boat in this setup? If I may ask?
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Old 01 September 2011, 04:19   #18
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My Honda 225 weighs in at 275kgs... Less than twins would be.

It's going cheap
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Old 03 September 2011, 05:22   #19
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Quote:
Originally Posted by spartacus
How about a couple of Yamaha 100hp 4-strokes? Too heavy at 170kg each? West Wales Yamaha Marine : Outboards : Chandlery : Servicing : Boat Packages : Neyland : Pembrokeshire

Still a Yamaha 90hp 2-stroke here... that's one down one to find!
Outboard Marine Services
I've just brought in a Yam 90 2 stroke. 2004 with 97hrs. May be looking to move it on soon if that helps complete the set!
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Old 03 September 2011, 05:51   #20
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What was wrong with the Yamahas? Fishery patrol ribs usually seem to use Yam 2 strokes so I guess they are well regarded.
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