Reply
 
Thread Tools Search this Thread
 
Old 06 July 2012, 17:42   #21
Member
 
m chappelow's Avatar
 
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
An Italian company called Ruggarini brought out a couple of Diesel outboards in the early 1980 s think they did a 27 hp and a larger version , I was tempted to buy one for a fishing boat but high weight and lack of portability plus price dictated otherwise .
I also had a 15 hp Kerosene Yamaha outboard , start it on normal petrol/oil mix then when it was warmed up it could be run on kerosine/oil mix down side was I had to have 2 fuel tanks and it finished up kerosine was getting hard to obtain it would run on parafin with a slosh of petrol mixed in but the exhaust coated the stern of the boat in a oily sooty film
Only difference was the engine had 2 float chambers mounted on the carb and a double fuel pump back to back , also has a rubber water pipe that came out of the engine block up to the carb and back to warm the kerosine up , don't know if the compression was a bit lower than the standard petrol yammy engine .
__________________
m chappelow is offline   Reply With Quote
Old 06 July 2012, 20:15   #22
CJL
Member
 
CJL's Avatar
 
Country: UK - England
Town: London/Oxford
Make: Ribcrafts
Length: 5m +
Engine: 150hp/2x115hp
MMSI: 235090215
Join Date: Oct 2002
Posts: 2,250
RIBase
Send a message via Skype™ to CJL
2nd hand Yanmar Diesel Outboards - Used Yanmar D27 & D36 4 Stroke Diesel Outboard Motors for Sale - Detailed info for Used Yanmar D27 & D36 4 Stroke Diesel Outboard Motors for Sale,diesel outboard motor,Used Yanmar D27 & D36 4 Stroke Diesel Outboard Motors for Sale, on Alibaba.com
__________________
www.northernexposurerescue.org.uk - A registered charity supporting sports and community events across England and Wales
Also why not check out the Ribcraft Owners Group?
CJL is offline   Reply With Quote
Old 06 July 2012, 20:20   #23
Member
 
Tim M's Avatar
 
Country: France
Town: Côte d'Azur
Boat name: Beaver Patrol
Make: Avon Searider SR4
Length: 4m +
Join Date: Jan 2004
Posts: 5,934
The PLA have just changed their Ruggarini diesel outboards for Mercury 4 strokes, despite the lack of fuelling facilities on the Thames. I think that must be testament to their capabilities (or lack of!)!
__________________
Tim M is offline   Reply With Quote
Old 06 July 2012, 20:45   #24
Member
 
spartacus's Avatar
 
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 70hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 4,651
RIBase
Quote:
Originally Posted by Pikey Dave View Post
I do recall in the dim & distant past seeing diesel outboards, afaik, they were poo, huge, heavy, noisy, underpowered.
You can add 'expensive' too. Quite a good link to the same discussion on another forum:
Diesel outboard motors - Boat Design Forums

Couple of Yanmar diesel outboards here: North West Trading Co. | Yanmar Diesel Outboards
__________________
Is that with or without VAT?
spartacus is offline   Reply With Quote
Old 07 July 2012, 20:54   #25
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,632
Diesel outboards have of course been discussed on Ribnet before: http://www.rib.net/forum/f36/big-die...ed-8417-3.html This also includes comments from Turbodiesel who I believe was involved in the development/testing of the 'multi fuel' etecs...

To go back to the original question:

Quote:
Also, in the perfect world of course I would like to do this for no cost, i.e. I find someone who wants to switch from diesel to petrol. Of course I realise this is not necessarily realistic, so what sort of cost implications are likely if we were to switch to say a 50HP 7 year old Diesel engine (I plucked that age/HP out of thin air, the RIB is a HUMBER 5.5m, happy to listen to suggestions)?
as others have said nobody makes a diesel outboard above 35HP (and even those are very rare). Diesel ribs are essentially all inboard engines. Typically the amount of deck space lost to the engine means you will be 6m+ for an inboard diesel (although if you hunt you will find some SR5.4's etc). As a result you will also usually be looking at at least 120HP engines as well.

Of course when the boat is that big the ease of fuelling becomes more important. I'd have thought for a 60HP devising some sort of trolley system for moving fuel tanks would be easier than changing the engine...
__________________
Poly is offline   Reply With Quote
Old 08 July 2012, 16:19   #26
Member
 
Country: UK - England
Town: London
Length: 4m +
Join Date: May 2011
Posts: 266
It sounds like a trolley could well be the way forward...
__________________
vjmehra is offline   Reply With Quote
Old 08 July 2012, 18:12   #27
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Quote:
Originally Posted by Pikey Dave View Post
Dunno, I know kerosene's not a million miles away from diesel, our heating oil delivery docket always says "MUST NOT BE USED AS ROAD FUEL" across it
Isn't that due to the taxes collected on it (or not, as the case may be), rather than how it burns?

That would be my first suspicion on this side of the pond.

jky
__________________
jyasaki is offline   Reply With Quote
Old 09 July 2012, 08:39   #28
Member
 
Cookee's Avatar
 
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
Quote:
Originally Posted by wellhouse View Post
unfortunately it will vary region by region depending on which refinery/company has supplied it. marine gas oil can be upto 1000ppm sulphur which helps alleviate the problem but this is no longer supplied as dyed gas oil 10ppm.
Reg\rdless of the ppm Sulphur content we have refuelled around the country which would imply the the worst fuel is adequate for our Yanmars - how about using that as a starting point!

The point is can that rude be used with marine diesel!!!!!!!!!!!!
__________________
Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
Cookee is offline   Reply With Quote
Old 09 July 2012, 09:54   #29
Member
 
Country: UK - England
Town: hampshire
Length: 7m +
Join Date: Apr 2012
Posts: 353
diesel

Quote:
Originally Posted by Cookee View Post
Reg\rdless of the ppm Sulphur content we have refuelled around the country which would imply the the worst fuel is adequate for our Yanmars - how about using that as a starting point!

The point is can that rude be used with marine diesel!!!!!!!!!!!!
if you pm me your number, i'll have a chat. It's not as straight forward as you might think. Cheers.
__________________
wellhouse is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT. The time now is 19:44.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.