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02-04-2015, 09:18 PM
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#1
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Senior Member
Join Date: Jan 2013
Location: Brooksville FL
Posts: 199
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Diesel Generator Life
Quick question. How many hours do you have on your diesel generator. I am trying to get an idea of the service life I can expect out of my Onan 8kw. All replies appreciated.
Randy W
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02-04-2015, 10:45 PM
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#2
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Junior Member
Join Date: Dec 2014
Posts: 17
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Our 7500 Onan has over 2700 hours. Still starts and runs perfectly.
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2003 Mandalay 40B, 330 Cat, 2012 Malibu LTZ
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02-04-2015, 11:20 PM
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#3
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Senior Member
Join Date: Feb 2010
Location: Sunnyvale, CA
Posts: 1,195
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If you change the oil and maintain filters and fluid, I'd be shocked if you ever wore it out. Figure it is good for 10,000+ hours...
Steve
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The Green Machine -- 2000 Mountain High Coachworks Summit (Spartan chassis / Cummins ISC)
...and F-Troop: Fearghus, Fiona, and Frankie (Cairn Terriers)
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02-05-2015, 07:37 AM
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#4
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Senior Member
Forest River Owners Club
Join Date: Aug 2002
Location: ...East Texas
Posts: 5,325
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Mine has 1,200 or so. I service it once a year and use it regularly.
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Paul (KE5LXU) ...was fulltimin', now parttimin'
2022 Coachmen Leprechaun 319MB
towing 2017 Jeep Grand Cherokee Limited
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02-05-2015, 09:59 AM
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#5
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Senior Member
Join Date: Dec 2013
Posts: 168
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Run it ALOT!!
The biggest problem folks have is not running the generator enough.
It requires 2 hours at >50% load every month.
In summer run your AC's and HW Heater
In winter, use space heaters and anything else you can figure out.
I have heard the Onan Diesels last over 10,000 hours!!
JohnnyB
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2014 ShowHauler 45'
2014 Dodge Ram 1500 Laramie
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02-05-2015, 10:14 AM
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#6
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Senior Member
Join Date: May 2012
Posts: 3,816
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Onan says the service life is around 20,000 hours. The most likely needed part then will be brushes on the head.
99% of RV will never come close to wearing it out.
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2011 MVP Tahoe 230 QB on Ford E350 Chassis
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02-05-2015, 02:52 PM
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#7
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,897
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My Onan has over 1,800 hrs on the clock. Runs great! Exactly like your diesel drive engine, keep fuel filters changed, keep oil N filter changed per schedule. Then operate the genset monthly as stated in owners manual.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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02-05-2015, 02:58 PM
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#8
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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There was a post somewhere of an Onan with 25,000 hours on it with no major problems.
Usual problem is not running them enough. We're in the process of buying a 2009 CC Magna, the gen has 371 hrs on it which might be OK.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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02-05-2015, 10:29 PM
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#9
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Senior Member
Country Coach Owners Club
Join Date: Dec 2010
Posts: 7,794
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Quote:
Originally Posted by Mr_D
There was a post somewhere of an Onan with 25,000 hours on it with no major problems.
Usual problem is not running them enough. We're in the process of buying a 2009 CC Magna, the gen has 371 hrs on it which might be OK.
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Read the same article about the 25K hours, nothing but oil and filter changes.
The newer Onans have the magnets glued on so it is very important to run the genny often to dry things out. Seems if you don't run it, the glue absorbs moisture and then the genny comes apart
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Don
2002 Country Coach Intrigue
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02-06-2015, 06:20 AM
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#10
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Senior Member
Monaco Owners Club
Join Date: Sep 2013
Posts: 2,501
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Quote:
Originally Posted by dons2346
The newer Onans have the magnets glued on so it is very important to run the genny often to dry things out. Seems if you don't run it, the glue absorbs moisture and then the genny comes apart
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30 years ago I had that happen to the Generac generator in my motorhome. I glued the magnet in backwards & it took a while to figure out why it didn't work.
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2014 Newell 2020P 45'8" ISX 600 HP
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02-06-2015, 07:34 AM
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#11
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Senior Member
Join Date: Nov 2014
Posts: 1,149
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1650 hrs on a 10,000 Quite Onan. Just had it serviced by RV Mobile Lube. Oil/Filter/Air Filter/Fuel Filter/Belt. The Whole Meal Deal! Puts out 13.5 and will run everything.
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06 Holiday Rambler 45' PBQ
USAF Vietnam Vet 68-72
A1E/A1H Skyraider "SandyHobo"
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02-06-2015, 03:52 PM
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#12
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Senior Member
Tiffin Owners Club
Join Date: Jan 2011
Location: Summerfield Fl.
Posts: 300
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Ours had 167 hours when we got it now at 2750 oil change at 100- 150 hours. Sometimes turn it on Friday when we leave and it runs tiil Sunday when we return. Onans are GOOD.
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Tom Homestead Fl.
2017 Tiffen Pheaton
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