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Old 03-06-2014, 06:22 PM   #1
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Onan 8000 ticking noise

we have a 2007 Pacifica with an Onan 8000 quiet diesel generator. A couple days ago I heard a fast ticking noise in the front of the MH. I pulled the gen out to investigate and it was the generator making the ticking noise. I also noticed the start/preheat button had the red light on. I pushed stop and the ticking stopped. My question is it has occurred to more times and we have not used the gen. Any thoughts of what's going on?
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Old 03-06-2014, 06:33 PM   #2
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Check...

Check the shutoff switches. Don't forget the one on the generator itself.
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Old 03-06-2014, 06:53 PM   #3
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mmm will do. I actually haven't ran it for sometime so hadn't thought of those. thanks much
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Old 03-06-2014, 10:59 PM   #4
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Check for an exhaust leak between the head and exhaust manifold when running as that will also make a noise similar to that.
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Old 03-07-2014, 05:00 AM   #5
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The ticking noise is the fuel pump running. On the gas and quiet diesel series onan gensets, holding STOP primes the system by running the fuel pump without initiating a start - most commonly used after replacing the fuel filter to re-prime. In your case there is most likely, as muddypaws suggested above, a remote start/stop switch that is stuck in the STOP position. If I find a coach with this problem it's generally the start/stop switch located in the bedroom next to the bed and something has wedged against the switch, such as a comforter or pillow. It is also possible a switch has been damaged by being struck with something accidentally, or there is a short in one of the remote buttons wiring due to a staple, screw, etc.
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Old 03-07-2014, 04:00 PM   #6
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In my case...

In my case it was the wedge I put under the start position of the switch to keep neighborhood cats from starting the genset when they put their fuzzy little paws on it when they jump up or down.

It actually happened. The muddy little paw prints proved it.
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Old 03-07-2014, 04:23 PM   #7
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sometimes moisture gets into the plug from the generator
that goes to the remote start switches. I pulled mine apart,
cleaned it, applied some dielectric grease, put it back together,
put a layer of grease at the plug joint..never had another issue.
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Old 03-09-2014, 11:53 AM   #8
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Smile Thank You

Thank you to all that responded. my issue turned out to be a remote switch that was stuck. shut that switch off and cleaned and whaaallaaa. All is good again
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