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actually that's alot lighter than I expected.

the Yamaha F350 is 804 to 822# depending on shaft length and these specs say it's 723# "pre-production" on their 300 hp
 

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I have always wondered about a diesel outboard and what was the issue of why they have not seemed usable for the most part. Has it just been a size and weight issue?
 

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Discussion Starter #6
I would think the issues with a diesel ob would be upfront cost, weight, and top end speed which is most likely not very good because of the lower rpm range that a diesel has.
 

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Cuz (10/26/2007)I would think the issues with a diesel ob would be upfront cost, weight, and top end speed which is most likely not very good because of the lower rpm range that a diesel has.
But could the added torque of a diesel turn a larger pitch prop to gain added top end speed to compensate for the lower RPM?
 

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Discussion Starter #8
Knot a Yacht (10/26/2007)
Cuz (10/26/2007)I would think the issues with a diesel ob would be upfront cost, weight, and top end speed which is most likely not very good because of the lower rpm range that a diesel has.
But could the added torque of a diesel turn a larger pitch prop to gain added top end speed to compensate for the lower RPM?


I probably would but it would be to large forthe foot and cavatation plate. The pictures look as if it is a standard looking prop. It would be interesting to know how it does run. :letsdrink
 

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slow diesels are a thing of the past, check out the 37' Spectre Center Console. There is at least one I know of fishing the SKA this year with Twin Yanmars, mercruiser I/O's that cruises in the mid 40's and top end in the 60's.

I would think size and weight were the obstacles to overcome in adapting it to the outboard but it looks like they've even got that now
 

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I heard about it. I know they are testing them down in the secret lake in FL.

That would be something to look into.
 

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Knot a Yacht (10/26/2007)
Cuz (10/26/2007)I would think the issues with a diesel ob would be upfront cost, weight, and top end speed which is most likely not very good because of the lower rpm range that a diesel has.


But could the added torque of a diesel turn a larger pitch prop to gain added top end speed to compensate for the lower RPM?


Not only changing the prop, but the gear ratio could be changed and the diesel would turn the higher gear. But you might run into problems with a faster idle in gear speed....I could see people running into docks and such.....lol.
 

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Looking at their website, it says they will be offering retrofits to existing Mercury models in Nov. 2008:<LI class=style4>Retro-Fit for Mercury 3.0L Midsection <LI class=style4>Uses Standard Mercury Lower Unit <LI class=style4>Similar Performance to 225HP Four Stroke <LI class=style4>Uses 6 Gallons of Fuel Per Hour @ Rated Power <LI class=style4>Production Starting November 2008 <LI class=style4>Other Retro-Fit Models Coming Soon </LI><P class=style4>They claim a WOT of 3800 on the lower unit-midsection of the Mercury whichs turns at 5750WOT.<P class=style4>No gear change so I guess it will spin the prop that much slower.
 

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<UL><LI>The weight alone 723# is huge. Really nice if it all works as promised. :bowdown Sea-r-cy</LI>[/list]
 

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Chevron and other oil companies bought lots of diesel out boards for the Nigerian villagers along the rivers and coasts as bribes to let them drill in their waters. Seems as though there were some Yahamas and Suzukis as well as some other brands. Not real environmentally friendly
 
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