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Old 01 July 2005, 04:34   #1
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Country: UK - Channel Islands
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Make: XS-Ribs
Length: 9m +
Engine: 2 x 225hp Optimax
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That old chestnut again!

Hi all,

I know this has probably been answered before but as I hadn't heard anything for a while I wondered whether there had been any technological advance in marine diesel engines.......more importantly size and weight.

I notice XS-Ribs are going to start doing a 7.5m, 8.5m and 9.5m range and it got me thinking about what the best size diesel engine for a 9.5m rib would be.....based on cruising at 35knts(ish).

I'm looking for a lightweight engine or something that can at least compare with a twin outboard installation on weight and power.

What do people reckon is this realistic or how close can I get??
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Old 01 July 2005, 04:46   #2
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Engine: 44lbs of thrust....
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Yer just too late........
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Old 01 July 2005, 04:59   #3
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Nice!

All we need now is the freighter it came out of and stick some toobs on it!
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Old 01 July 2005, 07:03   #4
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Country: UK - Scotland
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Make: Redbay 11m Cabin
Length: 10m +
Engine: 2 x Yamaha422Sti 275
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Posts: 567
Yamaha 421Sti

I personally would go for the Yamaha. Its robust, reliable and good value. I think they are now putting out about 260-280hp, which gives it good PtW ratio.
The largest buyer of these engines in the UK is the Army/Navy for the new rigid raider I think, then of course Redbay . The other option is this Rolls Royce V12 with only 42hrs, c/w free 500Kva Geni
All in my humble opinion of course
Andy

ps see Redbays new website at www.redbayboats.com
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Old 01 July 2005, 07:06   #5
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Country: UK - Channel Islands
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Thanks Andy!

Anyone have an idea of prices for these or where I can get hold of a price list?? I seem to remember that Yamaha don't publish their prices on the internet which is a little unhelpful, but if anyone can get me a price it would be very much appreciated.

Ta

P
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Old 01 July 2005, 07:11   #6
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Country: UK - Scotland
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Try Bill Brown at BBMS 01489580250. I have allways found him to be very helpfull, in fact now I order any spares direct from him as he seems to be the only Yamie dealer that keeps anything for the inboards in stock .
Andy
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Old 01 July 2005, 07:17   #7
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Thanks Andy!
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Old 01 July 2005, 08:51   #8
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Would you be so kind as to report your findings RE pricing back here so "onlookers" like me can get an idea. Thanks.
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Old 01 July 2005, 10:54   #9
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For the on-lookers:

Price for the ME421 STi works out at around 14,500 +VAT and kicks out 243hp @ 3800RPM

Now that's pretty good considering a new Verado is approx 16-18k (inc vat) so why is it that as soon as you mention sticking a diesel into a rib does the price suddenly rocket!?

Surely it's not 5k's worth of more difficult sticking a diesel engine and stern drive into a rib than it is chucking an outboard on the back!?
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Old 01 July 2005, 10:58   #10
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Engine: 44lbs of thrust....
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Quote:
Originally Posted by pettal
Surely it's not 5k's worth of more difficult sticking a diesel engine and stern drive into a rib than it is chucking an outboard on the back!?
Perhaps they charge by the Lbs............
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