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Old 30-11-2016, 12:39   #46
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Re: Diesel outboards?

Here you go. 12hp and only 147 lbs! I'm sure that can be adapted in to an outboard

One cylinder - Four stroke diesel - Direct injection - Air cooled via flywheel fan - Gravity fuel supply - Forced lubrication - Centrifugal speed governor - Cast aluminum crankcase - Automatic fuel bleeding system - Rope or electric starting

Air cooled DEUTZ diesel engines
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Old 30-11-2016, 12:54   #47
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Re: Diesel outboards?

Does Klaxon still make them in Australia? My understanding when I looked into it 15 years ago was that diesel outboards would not meet US emissions standards and hence were no longer on the US market.
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Old 30-11-2016, 13:02   #48
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Re: Diesel outboards?

Quote:
Originally Posted by a64pilot View Post
Yours that ran on kerosene was a real Diesel, I flew models for many years, yet never saw a real Diesel, I think they are rare.
The ones that ran on alcohol, nitromethane and back in the day castor oil, are glow ignition engines, not Diesels.
No. Mine was NOT a glow plug motor. Compression ignition only , Elfin 1.5 cc ran on ether and castor oil. DIESEL. My uncle gave it to me, At the time he was a design engineer with Daimler Benz in germany, knew his stuff as I later did also with Mercedes Benz. Callled him this morning, confirmed diesel. I did have other glow plug motors too. The Elfin WAS diesel.
A64, did you fly rotary in Vietnam by any chance? Just curious.
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Old 01-12-2016, 12:58   #49
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Re: Diesel outboards?

Quote:
Originally Posted by a64pilot View Post
Yours that ran on kerosene was a real Diesel, I flew models for many years, yet never saw a real Diesel, I think they are rare.
The ones that ran on alcohol, nitromethane and back in the day castor oil, are glow ignition engines, not Diesels.
RC MODEL AIRPLANE ENGINE OK CUB .074 DIESEL | eBay

Arne Hende Elfin 50 Diesel Model Airplane Engine | eBay

If you search eBay for 'model airplane diesel' you'll find lots of diesels. You can know they're real diesels by their screws in the tops to change their compression, instead of a glow plug.

It stands: Small lightweight diesel engines are feasible and old hat. Why can't we have small diesel outboards.
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Old 02-12-2016, 04:38   #50
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Re: Diesel outboards?

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That's not always true. When it was launched in 2008, the 2L Subaru boxer diesel was actually smaller, lighter, more powerful and more economical than its petrol cousin
Subaru probably cut too many corners as they had a lot of crankshaft failures in the first two years (I know because I've had one of them).

No good for an outboard, but potentially a good inboard for a powerboat owing to the low CoG of the boxer format.
Sure you take a gas engine make some modifications to run as a diesel but as Subaru and Oldsmobile (remember the V8 diesel) found out, they don't last very long unless you redesign the block to handle the extra compression.
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Old 02-12-2016, 06:01   #51
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Re: Diesel outboards?

Many new engine designs such as the new Jaguar designs use the same engine blocks for petrol and diesel versions. I guess it's not surprising when the petrol versions need to handle 20psi plus if boost. Third last paragraph if you are interested...

http://europe.autonews.com/article/2...ngenium-family

Many modern diesels neeed turbos to make them perform. Is it feasible to turbo charge an outboard?
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Old 03-08-2018, 21:06   #52
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Re: Diesel outboards?

I don’t see how the Diesel engines in general will be able to meet the IMO 3 or the Inland Waterway Stage V emission requirements that begin in 2019, without major changes. The .1 particulate and 2.01 g/KWH NOx requirement will require exhaust after treatment. That won’t package well to an already large outboard. The new regulations do not differentiate between petrol and diesel or outboard vs inboard. Once again the activists are going to hurt the Marine industry.
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Old 04-08-2018, 06:36   #53
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Re: Diesel outboards?

[QUOTE=aklstw. Once again the activists are going to hurt the Marine industry.


15 container ships put out more oxides than all the cars in the world.
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Old 04-08-2018, 07:18   #54
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Diesel outboards?

Quote:
Originally Posted by John Holbrook View Post
Many modern diesels neeed turbos to make them perform. Is it feasible to turbo charge an outboard?


Mercury years ago supercharged their Verado outboard to give it the bottom end of a two stroke, give it a strong holeshot.
Itís not a Diesel, but a supercharger would likely be better for an outboard, cause the power from a supercharger is instant, where a turbo takes higher RPM and there is a lag.

Itís emissions that will kill a Diesel outboard, itís almost killed on road Diesels, they have become so complex, and with the fuel costing more than gas, there isnít much point to a Diesel anymore.
In the US itís extremely difficult to meet emissions with a Diesel, without cheating.
Technically itís not cheating, manufacturers are allowed to disable emissions controls to protect the engine, and they get to determine when it needs protecting, so some define the need for protection being at cruise RPM, or under acceleration, or normal operating temps.
All manufacturers have cheated and Iím sure still do, it goes back a long time, first cheating I remember was GM had the Cadillac so that anytime the heater or Airconditioner was on, the emissions controls were switched off, knowing the emissions testing was done with the HVAC systems off, and that was decades ago.
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Old 04-08-2018, 07:40   #55
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Re: Diesel outboards?

https://www.yanmarmarine.com/dtorque/
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