| How Long Can The Onan Stay Running? [message #254437] |
Sat, 05 July 2014 12:22  |
Cadillackeeper
Messages: 464
Registered: October 2012
Location: Fort Lauderdale
Karma: 1
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No plug in and 90 degrees plus,so genny has been on for over 24 hrs so far.So has the rear AC.Pretty impressive actually.
77 455 Elaganza II and 67 Animal, Built 500 Powered Eldo
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| Re: [GMCnet] How Long Can The Onan Stay Running? [message #254442 is a reply to message #254437] |
Sat, 05 July 2014 13:11  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Tony,
If you haven’t run your generator for periods before as a safety precaution I would suggest that you shutdown and check the oil every 12 hours to see if you're using any, if not then go once a day.
JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCMHI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan
On Jul 5, 2014, at 1:23 PM, anthony ezzo wrote:
> No plug in and 90 degrees plus,so genny has been on for over 24 hrs so far.So has the rear AC.Pretty impressive actually.
> --
> 77 455 Elaganza II and 67 Animal, Built 500 Powered Eldo
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: How Long Can The Onan Stay Running? [message #254445 is a reply to message #254437] |
Sat, 05 July 2014 14:24 |
Jim Galbavy
Messages: 1443
Registered: August 2007
Karma: 7
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You're going to go thru 2/3 to 3/4 gal. per gal. of fuel per hour. Total max of
fuel onboard of 50 gals. minus 6 gal. 44 gals. doing the math.
Now that being said you would be parked next to the gas pump. Us in Florida
usually figure safely 30 hours of run time for hurricane season.
jim galbavy
'73 x-CL ANNIE
Lake Mary, FL
[Updated on: Sat, 05 July 2014 14:25] Report message to a moderator |
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| Re: How Long Can The Onan Stay Running? [message #254455 is a reply to message #254437] |
Sat, 05 July 2014 16:28 |
Cadillackeeper
Messages: 464
Registered: October 2012
Location: Fort Lauderdale
Karma: 1
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I filled up right before and gauges say just under 3/4 on Main and just over 3/4 on Aux.New oil filter and change at the dealership before the trip.I need another 30hrs at least.So I will fill it up before the overnight stay.I am not too sure but the hrs on the remote start switch say 635.It is spinning on the right so I will see if it is actually working.
77 455 Elaganza II and 67 Animal, Built 500 Powered Eldo
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| Re: How Long Can The Onan Stay Running? [message #254477 is a reply to message #254456] |
Sat, 05 July 2014 20:32 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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Not a bad idea what JR mentioned about checking oil level.
It is good to rely on safty accessories, but never want to rely totally on them when given chance.
Oh! do not open the fill cap when the engine is running, did that in 1980 and I learned a lesson.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: How Long Can The Onan Stay Running? [message #254549 is a reply to message #254437] |
Sun, 06 July 2014 18:44 |
Cadillackeeper
Messages: 464
Registered: October 2012
Location: Fort Lauderdale
Karma: 1
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2 hot days and 2 hot nights.Just filled up with 26 gallons and 1 qt for the gennny. So calculations are really close to a little over 1/2 a gallon per hour.I just restarted and looks like it will be one more night like this.
77 455 Elaganza II and 67 Animal, Built 500 Powered Eldo
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| Re: How Long Can The Onan Stay Running? [message #254560 is a reply to message #254437] |
Sun, 06 July 2014 21:17 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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My Onan has now been running reliable for over 60 days and I ran it for an hour with the air conditioning load on it. I took the GMC out for the first time in really hot weather. The roof air kept me comfortable in 90 plus temp and high humidity. Engine temp also stayed good in some mixed city driving. I may order some Dura cool and attempt the dash air next.
I have not heard anything from Jim Miller for a long time. I hope he is ok. He taught me so much about getting the Onan working.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: How Long Can The Onan Stay Running? [message #254589 is a reply to message #254560] |
Mon, 07 July 2014 03:03 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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The last I heard from him both Senior and Junior were just fine. Jim Jr. was very busy doing a big installation and did not have much free time available for other things. A few of us still work for a living (not me).
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: How Long Can The Onan Stay Running? [message #254596 is a reply to message #254437] |
Mon, 07 July 2014 07:38 |
bobby5832708
Messages: 237
Registered: November 2006
Location: Winter Springs FL
Karma: 3
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A few weeks ago in an attempt to reduce the oil seepage rate of my Onan I replaced the oil sender (which wasn't leaking) and the oil filter base gaskets (which were leaking). I used a PS117 sender from Autozone as the replacement.
Things looked good, the Onan ran fine, so a job well done -- or so I thought.
A week-or-so later we're at the beach and the Onan stops running about every 2 to 3 minutes. It restarts immediately every time so I know it's not a fuel issue. After a few stop-starts I give up. When we get home I measure the 'new' PS117 and find it to be about 150 ohms with the engine running and about 10 ohms with the engine off. Whacking it with a wrench makes the ohm readings jump all over the place. Went back to Autozone to get a warranty replacement (which still works fine as of yesterday's beach trip).
For grins I dug the old sender out of the trash bin and measured it. It's open. Whacking it makes no difference, it's open all the time. This means that for who-knows-how-long my Onan would have never shut down due to low oil pressure.
Conclusion:
1. Old oil senders can fail electrically and you would not know it until you either measured the sender or you let the engine run out of oil (big bang theory).
2. New oil senders can fail electrically and in a pretty interesting way.
3. I wonder how many other Onans are out there with oil senders that don't work. Unlike with a cars dash oil light, on the Onan you will never know if the sender is closing at low pressure like it should.
Bob Heller
2017 Winnebago 29VE
Winter Springs FL
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