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Old 12-29-2015, 03:22 PM   #11
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I live in Nevada and often times I have to run the gen while travelling down the road and it will shut off. It will do it quicker if both A/C are running. It has to do with the overheat protection built into the generator. It doesn't allow the generator to overheat to prevent damage. I sometimes will also take the cover off to allow a little more airflow across the gen set and that helps. I think it is normal and the way it is designed.
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Old 12-29-2015, 03:55 PM   #12
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I live in Nevada and often times I have to run the gen while travelling down the road and it will shut off. It will do it quicker if both A/C are running. It has to do with the overheat protection built into the generator. It doesn't allow the generator to overheat to prevent damage. I sometimes will also take the cover off to allow a little more airflow across the gen set and that helps. I think it is normal and the way it is designed.

Not sure if you have an Onan genset but if so, NEVER run it with the cover off. The internal cooling fan is designed to work with the cover on and running with it off will actually cause overheating.
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Old 12-29-2015, 04:13 PM   #13
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I'll go with what Bob Hanke said. How much fuel was in the tank? Genset fuel pick-ups are usually higher than the one for the engine. That way the genset won't burn all the fuel in the tank and leave you stranded.
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Old 12-29-2015, 04:20 PM   #14
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I'll go with what Bob Hanke said. How much fuel was in the tank? Genset fuel pick-ups are usually higher than the one for the engine. That way the genset won't burn all the fuel in the tank and leave you stranded.
Mine was a full tank when it happened. I'll go with what Onan said as they knew exactly what I was talking about and explained the cause thoroughly .

However, on other brands, perhaps the oil switch or high temp could be a cause too. I just assumed that if it can happen to an Onan it can happen to another brand as well...
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Old 01-04-2016, 06:17 PM   #15
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I had this problem with a Thor ACE a while back....haven't had it with the GTXL.

The generator can overheat and also suffer from fuel boiling and fuel starvation.

Here are fixes.....assuming the gen is located close to a heat source such as engine exhaust or engine compartment.

Order and install a generator compartment louvered vent. A few places online you can order from, they even come in a few common painted colors. Aluminum 12" x 12" and have a screen that you can't see from the outside. I put photos on the Thor Forums with photos. Easy DIY Install.

Order and install an inline "push pump". About $ 40.00 from Summit Racing. Also easy DIY install and the pump is quiet. Wire it directly to the existing GEN pump hot wire so you do not need any additional on-off switches. When the gen starts and stops, so does the push pump.

Install some insulating wrap (self adhering) to any exposed fuel lines coming out of the gen set that are close to the exhaust or engine compartment.

Not sure which one of the above was the cure for mine, but they were inexpensive fixes so I did all of them. Well worth the small cost and effort as I never had a problem with the generator again after doing the fixes. Traveled last summer all the way across America and many days 100+ degrees in Vegas and Arizona....the gen set never quit.

Good Luck....

Tom
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Old 01-04-2016, 08:49 PM   #16
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Mine shuts off when I hit a bump. Sometimes it is the generator shutting down and sometimes it is the transfer switch disengaging.
I am assuming it is the low oil switch when the generator shuts off and when the transfer switch disengages I would think it is just a weak solenoid.
Doesn't happen very often.
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Old 01-04-2016, 11:07 PM   #17
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Generator quits when driving

I've been fighting this issue since 2013 with NO fix, mine shuts off when I hit a bump, sometimes it trips breaker inside coach, have to shut off A/C to restart and let transfer switch pull back In, I added hard start capacitors to a/c units, did nothing for me, replaced transfer switch, not fixed, Cummins has looked at it, Deans RV has looked at it, can't find anything wrong with it..... So I just deal with the issue year after year.... Fuel lines wrapped/ pusher add-on inline fuel pump will not have an affect on a generator the shuts off when ya hit a bump and immediately restarts.... Oh, and yes, I've tried several weights of oil and made sure it's full etc, nothing has changed anything for the better. You can read my previous posts etc.


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Old 01-05-2016, 07:11 AM   #18
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Send a message via Yahoo to bob caldwell
Add an external fan if you think heat is the cause
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