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Old 14 October 2014, 15:05   #1
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Sneaky pics optimax Diesel engine.

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Should be fun! Boat built but ribcraft as the demo platform for the engine.
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Old 14 October 2014, 15:35   #2
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Attachment 99948Attachment 99949

Should be fun! Boat built but ribcraft as the demo platform for the engine.
There's a newbie asking about a RIB with these fitted:
http://www.rib.net/forum/f16/identif...tml#post651256
1 stk. 10 mands RIB - gummibåd med 2 stk. 3,0 l Mercury påhængsmotorer til salg. P? Retrade kan du k?be brugt udstyr, maskiner, k?ret?jer og andet overskudsmateriel online. L?gg dit bud n?!
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Old 14 October 2014, 16:30   #3
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Attachment 99948Attachment 99949

Should be fun! Boat built but ribcraft as the demo platform for the engine.
Looks good...and smaller than I'd have thought...Be interesting to compare performance and economy figures against petrol powered 6.8!
Testing this week I hear
Looks like a Big Prop!!
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Old 14 October 2014, 16:50   #4
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Wonder how much torque it kicks out
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Old 14 October 2014, 16:51   #5
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Looking forward to seeing the results.
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Old 14 October 2014, 17:28   #6
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Would it be going too far to describe this as potentially the biggest change in small boat engines in a decade?
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Old 14 October 2014, 17:56   #7
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Those are not diesel's they are the JP optimax engines - Mercury Government Sales | Technology
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Old 15 October 2014, 04:05   #8
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Would it be going too far to describe this as potentially the biggest change in small boat engines in a decade?
As you say...potentially (If it's any good)..For sure!..Coiuld be a real Gamechager!
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Old 15 October 2014, 04:18   #9
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....Coiuld be a real Gamechager!
Shame we can't run 'em on red.
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Old 15 October 2014, 04:23   #10
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Shame we can't run 'em on red.
We could run them on "Green" however - interesting indeed!
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Old 15 October 2014, 04:25   #11
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We could run them on "Green" however - interesting indeed!
Chip oil, with 3000 shite hawks in tow.
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Old 15 October 2014, 04:27   #12
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Chip oil, with 3000 shite hawks in tow.
Chip oil?

No, Irish MGO is green, not red, naturally!
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Old 15 October 2014, 04:30   #13
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Shame we can't run 'em on red.
No reason you can't run on red just need to install a heating system if you want to legally declare 60/40 split
Then again if it's trailered who knows where you bought the fuel or whether you paid the duty on it
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Old 15 October 2014, 04:33   #14
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A diesel that runs up to 6000 RMP, impressive!!
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Old 15 October 2014, 05:26   #15
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Chip oil?

No, Irish MGO is green, not red, naturally!
Ah, tawt you meant bio chip fat smelly stuff.

Wasn't changing the colour of fuel oil big business over your way a few years back?
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Old 15 October 2014, 10:41   #16
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I'm assuming these are a two stroke smoker?

Interesting if so & the fact they run on just about anything oily seems a good idea. Jet A1 is apparently quite cheap...
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Old 15 October 2014, 11:07   #17
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Sneaky pics optimax Diesel engine.

A Google search says these have been around for 10 years. The one page I read had a response from the engine guy saying to run them on regular ultra low sulphur diesel.

Oops. Said they can burn diesel in a pinch or for a short time. It was a Mercury blog. Having trouble with the phone pasting the link.
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Old 15 October 2014, 11:38   #18
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I wonder how heavy it is compared to a normal petrol outboard...
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Old 15 October 2014, 13:06   #19
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Modern diesel tech is so advanced, the weight difference is narrowing all the time, apart from low end torque and fuel variety, kinda makes me wonder why they see it as worthwhile ... ? top SUV's aren't seeing much difference in consumption between 3.0 diesels, and larger petrols .. 0-60 stats are similar too, petrols cheaper ofcourse, which balances the better diesel mpg .. so what do we have ? better torque,economy, simpler electrics ?
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Old 15 October 2014, 13:34   #20
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There were diesel engines being fitted to aircraft 5–10 years ago, but I'm not sure what's happening now: the main manufacturer went bust.

Fuel consumption and availability were supposed to be the big benefits, but they weren't catching on all that well. Presumably they managed to make them at least somewhat light-weight, and maybe diesel outboards could benefit from similar engineering.

Nitrous oxide emissions are nasty, though. I wouldn't be too surprised to see higher fuel duty for diesel if it continues to be a problem in London. That or higher VED for diesel cars.

Diesel's a bit safer to handle, though. Does that affect how easy it is to get a boat coded?
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