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Diesel engines (again)


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#11 Myjane

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Posted 14 February 2018 - 10:14 PM

I brought an English marinised motor for my boat. Some of the motors I saw in the factory in England while I was there were set up for the canal boats same block but beautyfull painted and polished brass fittings , some steel parts dipped and polished on brass or bronze I was told they were for canal boats
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#12 Chrisc

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Posted 14 February 2018 - 10:15 PM

Yes, that's the juggling act. We are looking at boats 10-12 metres , around 10 tons with preferably not more than 80hp. That HP is really too much for the french canals where the speed limit is around 6km/hr. The problem is that in order to get from one canal system to another you are obliged to travel for quite some distance on the Rhone where the current is 2-3 knots and often up to 5knots if it's been raining. The Rhone valley is also subject to the mistral so you may find yourself punching into 40+knots of headwind. The juggling act is trying to get an engine that will cope with both scenarios.
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#13 Island Time

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Posted 15 February 2018 - 07:47 AM

Chris, a 100 horse motor would be fine, and give you the power to push a current. Personally I'd prefer a non turbo version as then there is no turbo vane to carbon up when running for long periods at reduced power. 1/2 throttle is fine. Just remember that it's good to use more when you can.
Think about these diesel motors in their designed role - automotive. They don't normally do long periods with the throttle wide open, just a few seconds or minutes hauling a load up a hill now and then.
Also, a canal boat is no yacht - much harder harder hull shape to push through the water.
So my 2c worth is don't get too hung up on the power, and a 6 is better than a 4. (lower revving, more torque, longer life, smoother, less likely to be turbocharged).
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#14 Chrisc

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Posted 15 February 2018 - 09:50 AM

Thanks IT,
The top contender at the moment is an 11m boat with a 6cyl 90hp Ford Lehman in it and marinized by someone called Mermaid Marine in the UK. Supposedly with 1500hrs on it which is a bit hard to believe.
I am to be dispatched to Holland shortly to see for myself.
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#15 Myjane

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Posted 15 February 2018 - 11:10 PM

Try beta marine uk look at ther stock for canal boats there priced right compared to this place
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#16 Willow

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Posted 16 February 2018 - 11:08 AM

Personally I wouldn't touch a marinised ford with a barge pole, some people like them (affectionately known as a bus engine) but can give problems if not used properly.


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#17 Island Time

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Posted 16 February 2018 - 11:34 AM

So can every motor Willow. I know of several Ford Lehmans with high hours (15000 +) and one that was stuffed at 1800 hours...

Anything can be broken.


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#18 Chrisc

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Posted 16 February 2018 - 12:10 PM

IT, you've said a couple of times now not to overthink the engine thing, or words to that effect. In retrospect I am convinced that is good advice. So whatever vessel we choose will ultimately be decided by a good survey report on hull, systems and machinery, and we will be content with whatever engine powers it. With the probable exception of a Chinese knockoff.
Through many decades of ownership, our mantra has always been, Never spend more on a boat than you can afford to lose.
Same applies now, and if we can't find a sound, suitable vessel within our strict budget constrants then we won't be buying.
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#19 darkside

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Posted 16 February 2018 - 12:19 PM

The big advantage of a 6 over a 4 cylinder is the smoothness. For an engine mounted inside where you live that is a big consideration. 60 degrees between the cylinders firing is so much better than 90.


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#20 harrytom

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Posted 16 February 2018 - 05:56 PM

6 cylinder 4 cylinder why dont they build 3 or 5 cylinders? take the diahatsu car smooth running being 3 pistons so I can see no problem with a 5 ?what I can gather the 3 works well because of balance.


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