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08-18-2012, 02:58 PM
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#15
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Senior Member
Newmar Owners Club Florida Cooters Club
Join Date: Apr 2011
Location: Venice, Fla.
Posts: 507
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My Generator repair guy told me that he has seen the Kubota/onan diesel generators go 20,000 hours in commercial and marine applications.
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--Chuck
95 Newmar Kountry Star, Spartan Chassis, Venice, Fla
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08-18-2012, 05:31 PM
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#16
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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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Quote:
Originally Posted by C-PHartley
My Generator repair guy told me that he has seen the Kubota/onan diesel generators go 20,000 hours in commercial and marine applications.
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On one forum there was one with over 25,000 hours on the meter and still doing just fine.
__________________
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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08-18-2012, 09:30 PM
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#17
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Member
Join Date: Dec 2011
Posts: 79
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Probablya dumbquestion, but it's not my first, If the generator is on and both a/c's and accessories and I plug into shore power. Where does the power come from
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08-18-2012, 09:31 PM
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#18
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Member
Join Date: Dec 2011
Posts: 79
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space bar not working well
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08-18-2012, 09:32 PM
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#19
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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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Quote:
Originally Posted by lms1943
Probablya dumbquestion, but it's not my first, If the generator is on and both a/c's and accessories and I plug into shore power. Where does the power come from
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On most the gen power take priority over the shore power, but it can vary depending on how the manufacturer wired it.
__________________
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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08-18-2012, 09:45 PM
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#20
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Senior Member
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 2,457
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Quote:
Originally Posted by lms1943
Probablya dumbquestion, but it's not my first, If the generator is on and both a/c's and accessories and I plug into shore power. Where does the power come from
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As stated above, most often Genny has priority. Important: you should avoid switching power sources with heavy loads like A/C running - it can cause excessive wear on the transfer switch contacts.
__________________
2008 Itasca 37H
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months
Yellowstone Lake 6-1-2012
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08-19-2012, 03:04 PM
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#21
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Senior Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Aug 2010
Location: S Western Indiana
Posts: 830
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I just did that no no. I turned my AC off but forgot to let the genny run a bit to cooldown. I guess I need a not for the engine and the genny to do that.
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08-19-2012, 03:06 PM
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#22
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Senior Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Aug 2010
Location: S Western Indiana
Posts: 830
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When we drove back from Indiana, that one day we drove for probably 12 hours, never shut the engine down or the genny. We had to get home, we didn't drive but around 65 most of the time but on a few good stretchs 70 as we had to be home for him to leave. We just traded seats and kept going.
He didn't check it but I did the other day and the genny nor engine used any oil so a 2000 mile trip with no usage. We were surprised and very pleased. I sure hope that is a sign of good things to continue.
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08-19-2012, 05:07 PM
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#23
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Senior Member
Join Date: Apr 2012
Location: Knoxville, TN
Posts: 185
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As anything else, it will last as for as long as it's maintained properly. My Generac Q55 runs like a Swiss watch at 2300 hrs, give or take a few. I change the oil and filter yearly (about 50 hrs ) and never have to add oil between changes. I assume the prior owners did regular maintenance on it since I have no troubles with it. I check the oil during "pre-flight inspection",fire it of and let it run about 3 minutes with no load, before turning on A/C's. I also let it idle about 5 minutes at no load before shutting it down.
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1997 National Seabreeze 133 Limited
1993 Mazda Miata
2005 Basset Hound, "Fred"
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08-19-2012, 05:18 PM
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#24
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Nov 2009
Posts: 1,363
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Quote:
Originally Posted by ga traveler
When I went to the Onan factory school, they said the design life of the generator was ten thousand hours. According to Onan the number one reason for oil usage is shutting down the generator without letting it cool down. The load should be removed from the generator and the generator should be run about five minutes to cool down before shutting it down. If the the generator is shut down under load without being cooled down, You will have a dry start and the cylinder walls will scuff and cause oil usage.
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Huh?? Modern oils dont need "cool down" periods. Any mechanical engine has an oil pump. There is no "dry" start regardless of how many RPMs the unit was turning when shut off.
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08-19-2012, 05:34 PM
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#25
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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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Quote:
Originally Posted by PatStab
I just did that no no. I turned my AC off but forgot to let the genny run a bit to cooldown. I guess I need a not for the engine and the genny to do that.
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Not even modern turbocharged diesel truck engines need a cool down period unless you're using them "HARD". Even going down an on ramp is enough cool down time now according to Cummins.
__________________
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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08-19-2012, 06:05 PM
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#26
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Senior Member
Workhorse Chassis Owner
Join Date: Aug 2011
Location: western n.c.
Posts: 388
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might try sea foam in it and see if it will help the rings, also shell rotella 15w40 oil might help also
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07 bounder 35e/workhorse
17 jayco northpoint 377 rlbh
17 3500 Duramax
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08-19-2012, 06:25 PM
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#27
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Senior Member
Ford Super Duty Owner
Join Date: Apr 2012
Location: Austin, TX
Posts: 1,886
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Quote:
Originally Posted by WeatherTodd
Huh?? Modern oils dont need "cool down" periods. Any mechanical engine has an oil pump. There is no "dry" start regardless of how many RPMs the unit was turning when shut off.
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It's air cooled, so they want you to take the load off of it first and have it decrease oil temperatures before shut down.... I'd be nice if Onan had a way to rig up an oil-cooler.
Going through the service manual on mine, I did note that I think they want to tear the top end off every 400 hours for de-carbon and I assume to check for wear... If you're pulling the top end every 400 - it's kinda cheating.. :-)
I've got one with 835 hours. We ran it over 65 a few weeks ago on a trip. It used no oil... Course, it wouldn't stay running when it was 105 out, but that's a different story...
So if you've got a gas (or diesel) genset - how many hours are on yours? Brand? Onan, generac, etc?
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08-19-2012, 06:36 PM
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#28
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Senior Member
Tiffin Owners Club
Join Date: Dec 2009
Location: Winter Park, Fl
Posts: 495
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Quote:
Originally Posted by WeatherTodd
Huh?? Modern oils dont need "cool down" periods. Any mechanical engine has an oil pump. There is no "dry" start regardless of how many RPMs the unit was turning when shut off.
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My Onan 10,000 Quiet Diesel manual recommends a 5 minute cool-down. My coach is an 07 so the gen is likely an 06, fairly modern.
__________________
2007 Allegro Bus 42 QRP, 400 ISL now 2017 LTV Serenity on a 2016 Sprinter chassis
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