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Old 09-22-2005, 12:00 AM   #1
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Onan MicroQuiet 4000 generator questions

I have a Onan MicroQuiet 4000 generator in my Itasca Spirit. I took the mh in for warranty repair on the generator. The fuel pump had failed. While I was at the generator repair shop the main person there,owner/manager, said that he has never seen a Onan MicroQuiet 4000 generator last more than 2000 hours. He also stated that it was a throw away generator. Meaning not rebuild-able/not cost effective. He claimed that the main cause for it not lasting more than 2000 hours is the lack of an oil filter.


thoughts/discussion
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Old 09-22-2005, 12:00 AM   #2
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I have a Onan MicroQuiet 4000 generator in my Itasca Spirit. I took the mh in for warranty repair on the generator. The fuel pump had failed. While I was at the generator repair shop the main person there,owner/manager, said that he has never seen a Onan MicroQuiet 4000 generator last more than 2000 hours. He also stated that it was a throw away generator. Meaning not rebuild-able/not cost effective. He claimed that the main cause for it not lasting more than 2000 hours is the lack of an oil filter.


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Old 09-22-2005, 01:18 AM   #3
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While I've never owned the Microquiet model, I would take that guy's statement as a grain of salt and not put much creedence in it. A man's entitled to his own opinion. That being said, if you're anxious about it anyway, consider getting other opinions, especially from Onan service people.
It's all relative to how much you use or don't use it, but 2,000 hours is a lot of hours (to me). I've never had gennies that approached that figure.
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Old 09-22-2005, 11:57 AM   #4
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by troth:

It's all relative to how much you use or don't use it, but 2,000 hours is a lot of hours (to me). I've never had gennies that approached that figure. </div></BLOCKQUOTE>

All of the generators we have owned have had a lot of use. My unit was purchased new in 2001. It has 1300+ hours on it now. We boondock (normally at off-road events) in hot climates a lot and it is not uncommon to run the generator all the time with the a/c on.
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Old 12-16-2008, 02:02 PM   #5
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I have a microquiet 4000 and the first time I used it, the gas ran low and it shut off...now when I try to crank it, it wont start..it runs a while when I have the start switch pushed but dies when I let go of it...yall have any ideas?
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Old 12-16-2008, 03:02 PM   #6
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Donnie,
Try holding the start/stop switch in the stop position for 30 seconds. This runs the electric fuel pump to reprime the carb. This is from the Onan 4KY owner's manual.
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Old 04-04-2010, 05:56 PM   #7
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We put over 7700 hours on our first Onan Microlite 4000 gas generator. It burned some oil and didn't have quite full power output, but was still working fine when we elected to replace it. BTW, we used Mobil 1 synthetic oil after the initial break-in period.
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Old 04-04-2010, 06:04 PM   #8
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Quote:
Originally Posted by Rick N Donna RVN View Post
We put over 7700 hours on our first Onan Microlite 4000 gas generator. It burned some oil and didn't have quite full power output, but was still working fine when we elected to replace it. BTW, we used Mobil 1 synthetic oil after the initial break-in period.
WOW. That is some decent hours! I just put Mobile1 in our new-to-us rig genny yesterday in preparation for summer.
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Old 08-20-2011, 07:21 AM   #9
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I've got about 46 hours my generator and will change the oil prior to a trip out West. From what I've read this is pretty straight forward as there isn't a oil filter. Is there any other filter I should address? I've seen where some folks use Syn Oil, however we use it very little and seems if we do a yearly change Dino oil should be fine. Txs
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Old 08-20-2011, 07:42 AM   #10
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[QUOTE=JC Andrews;107472]I have a Onan MicroQuiet 4000 generator in my Itasca Spirit. I took the mh in for warranty repair on the generator. The fuel pump had failed. While I was at the generator repair shop the main person there,owner/manager, said that he has never seen a Onan MicroQuiet 4000 generator last more than 2000 hours. He also stated that it was a throw away generator. Meaning not rebuild-able/not cost effective. He claimed that the main cause for it not lasting more than 2000 hours is the lack of an oil filter.


I found the low pressure electric fuel pump used in that generator "stops working" (No clicking noise when the stop button is held active) if the gasoline sits in it for several months without any movement. Yes I know No Use Is Abuse. I added Marvel Mystery oil in gas the line in front of the pump, let it sit for a day then compressed air to clean things up. The pump started working again. Been working for the past 30 or more hours on the machine.

I agree with the tech above, They sure are NOT the machines they were in the past, The older version was 2 cylinder engine with a pressurized and properly filtered oiling system.
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Old 06-17-2013, 06:56 PM   #11
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Have Gen Prob. with our Onan 4000.
Runs for a short time about 10/15 min. Than shuts down.
Sounds like it is trying to rev higher like if you out a load on it.
I have put a load like a circular saw and air compressor on it. Worked for a short while. Than just shut down.
Oil is full and clean. Gas tank full. Air filter good.
Would like to change fuel filter. But looks like a bear to change. Suppose to be able to change from outside. I can see it inside berried way out of reach.
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