Levitation
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They are all mere typos... Not worth commenting aboot, eh...
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Cruising speed and extra crew accomidations
- Thread starter thataway
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JamesTXSD
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bluebayou":mwvfyrlm said:ACCOMMODATIONS, please ! I have to laugh, at the level of rigor abour rpm's and and turbo's, meanwhile, the title of this Thread is horribly misspelled.
Sorry, spent too many days correcting English papers.
Charles
All that time spent correcting English papers and you don't understand punctuation and capitalization? Are the rpms or turbos possessing something? A comma after "turbo's" (sic) instead of a semicolon? Is "Thread" (sic) a proper noun? No subject in your last sentence?
Please redo this comment with the necessary corrections and submit it before class tomorrow to receive partial credit.
Most of these forums are pretty casual; spelling and punctuation are less important that sharing ideas... and when Dr. Bob asks a question, odds are pretty good we'll all have something to learn.
It might be time to leave the red pencil behind and get some time on the boat. 😉
Happy holidays,
Jim B.
Tomorrow's assignment: glass houses and stones
bbrh842
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O.K. folks. Be nice or Ranger will pull the plug on this thread and we won't get to find out about the turbo'ses.
I want to know if people who consistently run at low rpm'ses frequently experience problems with their turbo'ses.
I also want to know if people who consistently run at HIGH rpm'ses have problems with the engine throwing a rod.
I want to know if people who consistently run at low rpm'ses frequently experience problems with their turbo'ses.
I also want to know if people who consistently run at HIGH rpm'ses have problems with the engine throwing a rod.
rt11002003
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Running diesels at low rpm builds carbon in the engine and the turbo (if it has one). Running at a higher rpm (80 to 90% of max rated rpm) frequently will help offset the low rpm running, ie. helps burn carbon out.
Running at max rpm is limited to a very small amount of operating time, about 5%.
Allowing engine temp to stabilize by reducing rpm a few minutes before shutdown prolongs engine life and reduces heat stress on various components.
Follow Yanmar's recommendations in the operating instructions.
Gene
Running at max rpm is limited to a very small amount of operating time, about 5%.
Allowing engine temp to stabilize by reducing rpm a few minutes before shutdown prolongs engine life and reduces heat stress on various components.
Follow Yanmar's recommendations in the operating instructions.
Gene
Levitation
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Not to mention plural nouns' possessives...
denny-o
(don't be beaten me aggin cap'n; the devil made me do it! It twere me tortured childhood... Miz Little, with her spinster hair up in a bun and those little, round glasses, diagramming sentences, one after another on the board, and chanting "A predicate adjective always follows a linking verb." She worshiped Wordsworth and would never, ever dangle a participle... I still have nightmares about her, that's why I be drinkin rum ever night. Oh, the horror, the horror...)
denny-o
(don't be beaten me aggin cap'n; the devil made me do it! It twere me tortured childhood... Miz Little, with her spinster hair up in a bun and those little, round glasses, diagramming sentences, one after another on the board, and chanting "A predicate adjective always follows a linking verb." She worshiped Wordsworth and would never, ever dangle a participle... I still have nightmares about her, that's why I be drinkin rum ever night. Oh, the horror, the horror...)
NewMoon
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We have more than 4300 hours on our Volvo KAD44 diesel, and have run at relatively low RPM most of the time the last 2000 or so.
Idling for extended periods is definitely bad (at least on this sort of engine, fairly high power for its size), as is running at so low a power level that normal temperatures are not achieved, but we run at 1300-1400 RPM (WOT is 3900) and 6-7 knots, a tad above hull speed. This keeps temperatures up in a normal range, and seems to have no ill effects. We do pick her up to 3200-3400 RPM from time to time and make sure the carbon is blown out and the cooling system is working well. We have been very careful to have props pitched so that we can reach 50-100 RPM above rated WOT, even with a full load. It seems to me that the electronic engine control system helps keep the 44 working well with this sort of use.
Idling for extended periods is definitely bad (at least on this sort of engine, fairly high power for its size), as is running at so low a power level that normal temperatures are not achieved, but we run at 1300-1400 RPM (WOT is 3900) and 6-7 knots, a tad above hull speed. This keeps temperatures up in a normal range, and seems to have no ill effects. We do pick her up to 3200-3400 RPM from time to time and make sure the carbon is blown out and the cooling system is working well. We have been very careful to have props pitched so that we can reach 50-100 RPM above rated WOT, even with a full load. It seems to me that the electronic engine control system helps keep the 44 working well with this sort of use.
bbrh842
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NewMoon,
Everything you said agrees with my own practice.
I typicall run at 1600 RPM, half the rated RPM.
About every 4 hours I run at 2400 RPM for 5 or 10 minutes.
About every 50 hours I run at 3100 RPM for 5 minutes, for the same reasons you do, to blow out the soot, and test the cooling system.
This has worked for me for 400 hours.
Since it has worked for you for 4000 hours, I feel comfortable continuing my current practice.
Everything you said agrees with my own practice.
I typicall run at 1600 RPM, half the rated RPM.
About every 4 hours I run at 2400 RPM for 5 or 10 minutes.
About every 50 hours I run at 3100 RPM for 5 minutes, for the same reasons you do, to blow out the soot, and test the cooling system.
This has worked for me for 400 hours.
Since it has worked for you for 4000 hours, I feel comfortable continuing my current practice.
Levitation
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Well, over on the Diesel Forums there is photo story about a 2005 Chevy 2500HD Duramax that was traded back into the selling dealer for a new one... The 2005 has 751,000 miles on the original power train (engine/tranny/differential)... THe mileage was put on while delivering new 5th RV's from factory to dealer (i.e. pulling loaded to the hilt)
Levitation
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aaargh, fat fingered that one--- Last sentence -
So I dare you to wear out your Yanmar/Cummins R25 engines...
So I dare you to wear out your Yanmar/Cummins R25 engines...
RProffer
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I don't think you can really compare the Durmax to the Yanmar's we have in our boats. The engineering for the two are entirely different. The Duramax is designed for variable speed and the Yanmar's are designed for constant speed.
commander bill
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My Ford Powerstroke only has 70,000 miles but I have a friend with more experience. He has 2 Ford F350s for hix concrete contractor business. One is a recent turbo model & has 600,000 miles and other is older non-turbo 7.3L & has 750,000 miles. He drives both from Alabama to Atlanta daily loaded with many workers and dirty/heavy concrete finishing equipment. Neither engine has ever had any problems - only routine service.
I recently sold a 1986 Ford tractor (Japanese diesel engine) with many hours (engine ran like new but hour meter broke years ago. I bought the tractor new for $6800 and sold it for $5000. Including all the oil changes it cost me well less than $100/year to own it. I abused and ran the @#$% out of it. My friends with Yanmar tractors have all had nothing but perfect service. I doubt we will wear these yanmar engines out.
I recently sold a 1986 Ford tractor (Japanese diesel engine) with many hours (engine ran like new but hour meter broke years ago. I bought the tractor new for $6800 and sold it for $5000. Including all the oil changes it cost me well less than $100/year to own it. I abused and ran the @#$% out of it. My friends with Yanmar tractors have all had nothing but perfect service. I doubt we will wear these yanmar engines out.
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