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Old 25 February 2010, 09:10   #11
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but conversley in a vehicle application its the stop start that wears them out, marine engines tend to be more constant speed use and stopped/started less?
Yes, but the lack of gears in a marine application applys loadings which would be avoided in a geared vehicle. Labouring an engine is as detrimental to it's long term health as cold running and over reving IMV.
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Old 25 February 2010, 09:12   #12
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Duckin Fyxlexia is a Bsatrad.
yew tukk dat crittercysm kwite welle, i thort

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Old 25 February 2010, 09:21   #13
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yew tukk dat crittercysm kwite welle, i thort

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Old 25 February 2010, 10:31   #14
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Yes, but the lack of gears in a marine application applys loadings which would be avoided in a geared vehicle. Labouring an engine is as detrimental to it's long term health as cold running and over reving IMV.
You aint seen my driving.
I change down when I can hear the engine going 134213421342 and puffing black smoke rings out the exhaust with each power pulse, and change up when the pistons get out and do a little irish jig on the bonnet
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Old 25 February 2010, 10:38   #15
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8000 hours??

according to boat safe.com 8000hours
they do say they dont last as long as automotive engines though......


"Diesel engines are built to finer tolerances than are gasoline engines. They will accept much more abuse and often deliver, if well maintained, 8,000 hours of hard work before need a major overhaul. Theoretically, a well-maintained diesel may last the life of your boat. Since the average recreational boater logs only about 200 hours per year, the 8,000 hour diesel would last 40 years"
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Old 25 February 2010, 10:47   #16
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according to boat safe.com 8000hours
they do say they dont last as long as automotive engines though......


"Diesel engines are built to finer tolerances than are gasoline engines. They will accept much more abuse and often deliver, if well maintained, 8,000 hours of hard work before need a major overhaul. Theoretically, a well-maintained diesel may last the life of your boat. Since the average recreational boater logs only about 200 hours per year, the 8,000 hour diesel would last 40 years"
Unfortunately, it's the extended periods of non-use with a recreational craft that tends to do the damage.
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Old 25 February 2010, 13:08   #17
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I agree with much of what has been said, I maintain various diesels up around 10000 hrs, in regular use and have restored old vintage ones that in many cases require only minor wear parts ,.. these are engines that are 50 years old, and will still happily do a days work .. admitadly there lives have not been hard ones but I'm still impressed how long they have worked, in some cases with nothing more than good regular servicing. They might be noisier and less efficient, but by and large technology hasnt changed a lot over the years, save for better alloy parts, and injection and burn technology.

I've had trucks do 8 years service and 400,000km and still never use oil or show any obvious signs of deterioration

Older engines tend to be a bit more over engineered too, and arent built with the 'life/part/cycle' ideology that exists today .
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Old 25 February 2010, 18:28   #18
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No experience of small marine diesels but Dad has a Lister TS3 generator that did 30,000 hours before the heads were even taken off, still in perfect nick inside and overhauled ready for the next 30k!

Also on the farm we have a Lister 6/1 shearing engine (belt drive to an overhead shaft driving the shear motors) which was installed in 1958 and has never had anything other than an annual oil change in 52 years, though admittedly I've only known it for about the last 20. Doesn't even have a proper air or oil filter just chugs away at 600rpm forever. I don't know how many hours it has done but I'd guess somewhere north of 50,000 even though it sits unused for about eight months of the year every year.

Yes they both sit in a dry shed not around salt water, but if I had any diesel engine and only got 1500 hours out of it before it went bang, I think I'd be pretty p'd off.

The first set of Volvo TAMD61 marine diesels in the Nelson 42 at work were replaced at 12000 and 14000 hours.
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Old 25 February 2010, 18:53   #19
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http://www.yachtsurvey.com/GasDiesel.htm

This article may be of interest to Wildwords, unfortunately it seems to support Mollers' theory about limited usage in leisure applications leading to shortened engine life.

I appreciate that it is at odds with the Boatsafe article.

Once again, I profess to have no knowledge of the matter , so nothing new there!
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Old 26 February 2010, 02:56   #20
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Some farms around here have only ditched the Lister Startomatic gennies in recent years. A genny application is diesel heaven, light load, constant revs and a warm dry home. Just add fuel and occasional oil.
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