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Old 21 May 2015, 14:36   #51
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Like the OXE...

MEDIA - OXE
295-320kg
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Old 21 May 2015, 15:37   #52
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Simon B you are correct the R & D boys and Robby, had that one.If my memory is correct.I think it was the start of this generation of their diesel OBM.
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Old 21 May 2015, 17:21   #53
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Yes we spent years doing the 50hp engine, that was hard as it was multi fuel so ecu mapping etc for 3 or 4 types of fuel is even harder to do!
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Old 21 May 2015, 19:08   #54
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I can see the point in researching the multi fuel engine but if this recently announced engine is only to burn diesel why bother spark ignition & two stroke it's not exactly lightweight & it's hp/cc isn't great by modern standards
Come on turbodiesel what is the idea here?
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Old 22 May 2015, 01:19   #55
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NATO has adopted a single fuel policy for small internal combustion engines, so everything has to run diesel. Afaik, the diesel OBM was developed to satisfy this requirement, not because it was "better" Personally I think it will be a long time before us mere mortals will choose one over a petrol & even then, the initial outlay will negate any savings, unless you're doing very high hours.
Just my 2 penneth.


.....sh1t happens.......
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Old 22 May 2015, 03:26   #56
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Personally I think it will be a long time before us mere mortals will choose one over a petrol .......
I agree and if we're restricted to using 'white' diesel, there wouldn't be a much benefit for recreational users.
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Old 22 May 2015, 05:04   #57
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In our part of the world (away from the Solent !!) we would love a diesel O/B, as petrol is infrequently available but diesel is easy to obtain.
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Old 22 May 2015, 05:21   #58
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Not realy a problem with a water cooled turbo you can almost touch the case without getting burned
So, when you say "you can ALMOST touch the case", what you mean is its too hot to touch. Which is what I said?
Would also need a chargecooler which takes up space.

Look at how large a 250hp Verado is with a supercharger and chargecooler.
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Old 22 May 2015, 11:07   #59
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So, when you say "you can ALMOST touch the case", what you mean is its too hot to touch. Which is what I said?
Would also need a chargecooler which takes up space.

Look at how large a 250hp Verado is with a supercharger and chargecooler.
Water cooled turbos run on most inboard engines are cooled by the closed cooling system & are no hotter than the rest of the engine block. outboards are raw water cooled so in theory can be kept cooler because they are using cold water to cool them as opposed to a heatexchanger system
I'd have thought of all the technical challenges of building a diesel outboard cooling the turbo was a minor problem
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Old 22 May 2015, 11:25   #60
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Supercharger.There's no need for an exhaust driven system.
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