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I have a 2019Thor Outlaw 37RB with a Onan QG 5500 generator…

Customer Question
I have a 2019Thor...

I have a 2019Thor Outlaw 37RB with a Onan QG 5500 generator that will not stay running. Would like assistance on what to check?

Mechanic's Assistant: How can I help with your small engine question? What specific tool or machine does this involve?

Onan QG 5500 generator

Mechanic's Assistant: How long has this been going on with your Onan generator? What have you tried so far?

I have had the RV for 1 month and it has been doing it over the last 2 weeks

Mechanic's Assistant: Is there anything else the Engine Expert should know before I connect you? Rest assured that they'll be able to help you.

The generator has less than 260 hours on it and seems to be kicking off in heat above 90 degrees.

Submitted: 1 year ago.Category: RV
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Answered in 13 minutes by:
8/18/2021
RV Mechanic: BillP310, RVIA Certification replied 1 year ago
BillP310
BillP310, RVIA Certification
Category: RV
Satisfied Customers: 427
Experience: Expert
Verified

Good morning,  I'm Bill one of the RV tech experts here at Just Answer.
Thanks for using our service.  I could use a little more info on this.  When the generator shuts down is the red light on the start/stop switch on the generator blinking?  Let me know.  Thanks,  Bill

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Customer reply replied 1 year ago
The toggle switch on the dash will blink as well. I wait, then restart and it will run for maybe a minute...sometimes longer.It tends to work a night when it is cooler, but will not run on startup during the day or when moving down the road in FL heat (88 to 90+ degrees)
RV Mechanic: BillP310, RVIA Certification replied 1 year ago

I can relate to your heat issues as we are in N Carolina and it's been super hot here as well.  After your gen shuts down the light should be blinking 3 times.  If you push the stop button once it should blink out a 2 digit error code.  This is a completely air cooled generator that pulls in the cooling air from underneath.  You might want to slide under that and make sure there are not obstructions around any of the bottom openings.  Also,  double check that the oil is completely full on the dipstick.  These models are very finicky about oil level and if it is just a little low it can trigger a low oil shutdown.  If all those are good see if you can get me the codes.  If there are more than one pushing stop again after the first code will display the next and so on.  Let me know.  Thanks,  Bill

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Customer reply replied 1 year ago
Not at the coach right now but can check back. This is my 2nd coach, had a 32 ft FR3 prior. The generator had ventilation openings on the side vs a solid panel. Any feedback from Onan on if this would help?
RV Mechanic: BillP310, RVIA Certification replied 1 year ago

You may have had a Microlite gen in the FR3 then.  The 5500 draws everything from underneath and does not have the side openings.  Good ventilation under there is a must to prevent overheating.

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Customer reply replied 1 year ago
This one does draw 100% from underneath. Any other recommendations?
RV Mechanic: BillP310, RVIA Certification replied 1 year ago

That's about all I can offer without some trouble codes.  Speaking of which,  I will attach a link at the end of this explaining the various fault codes.  Don't worry that the gen pictured is not your model.  All models use the same codes.  I'll keep this chat open so you can let me know how you make out when you have a chance.  Thanks,  Bill

https://thecampingadvisor.com/onan-generator-fault-codes/

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Customer reply replied 1 year ago
Thank you! much appreciated
RV Mechanic: BillP310, RVIA Certification replied 1 year ago

Good morning.  Did you still need my help with this?  Let me know.  Thanks,  Bill

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Customer reply replied 1 year ago
I am all good Bill. Thank you very much.
Jeff
RV Mechanic: BillP310, RVIA Certification replied 1 year ago

Good morning Jeff.  Glad you got it going.  Let me know if I can assist in the future and Happy Camping!  Bill

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