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Generator Won't Stay Running


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#1 bowtorc

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Posted 03 September 2013 - 01:44 PM

I have a Onan Emerald generator that will start and run as long as you hold the inside or outside start button but dies as soon as you release the button.

 

Any suggestions would be greatly appreciated.


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#2 DickandLois

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Posted 03 September 2013 - 04:26 PM

Bowtorc, Welcome to FMCA !

 

Could you post the year, model number of you generator and if its Gas or LP.

 

What is the oil level in your generator? To much or to little will cause a shutdown.

 

You did not mention if you unit set any fault codes.

 

Rich.


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#3 desertdeals69

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Posted 03 September 2013 - 09:22 PM

It could be the voltage regulator.  We have replaced quite a number of them in our Onan shop in the past.  I even had to change one on my own Emerald.


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#4 Shell925

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Posted 04 September 2013 - 06:27 AM

I hope to find an answer here too. Mine does the same thing but only the inside switch. When I start it on the one at the generator it runs fine.
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#5 wolfe10

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Posted 04 September 2013 - 07:10 AM

Shell925.

 

Welcome to the FMCA Forum.

 

As Rich asked, please post specific information on year and  model number.


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Dianne and Brett Wolfe
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#6 Tcamperman

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Posted 04 September 2013 - 07:28 AM

My guess is you have a bad board...seen it many times...that exact sympton.  Get someone to check the printed circuit board.  ty 


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#7 wolfe10

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Posted 04 September 2013 - 07:38 AM

And, on some models, it would be as simple is incorrect (low) oil level. Without more information, we are all speculating.


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#8 Shell925

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Posted 06 September 2013 - 06:43 AM

It's a Onan Quiet Diesel 7500. The Motorhome is a 2005 Mandalay 40D. Thanks for any help. I have checked all the fluids and they are all OK.
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#9 DickandLois

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Posted 06 September 2013 - 03:18 PM

Shell925,

 

With the information you supplied, I would check the start switch inside the coach. The external and internal ones are in parallel and there is very little else in the circuit.

 

I will look and see if by chance I have the wiring information on your coach. There are differences in the wiring, but in this case most generator starting circuits are wired the same. Now, how they route the wires, that is a totally different story !!

 

One question, Can you stop the generator from inside the coach?

 

Rich.


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#10 Shell925

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Posted 07 September 2013 - 06:58 AM

Yes, I can stop it inside the coach after being started outside. Thanks for your help. I just did not want to buy a bunch of parts I don't needed trying to trouble shoot the problem.
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#11 DickandLois

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Posted 07 September 2013 - 07:43 AM

Shell925,

 

This is the link to a PDF copy of your owners manual. Kind of handy to have on you computer. It is a much quicker reference then digging through the hard copy. Only drawback is one can not make notes along the margins ! 

 

I see there is some real good information on the fuse and relay panels, but really nothing regarding the Generator.

I will look for some information regarding the generator.

 

http://thormotorcoac...ners-Manual.pdf

 

Rich.


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#12 patsy613

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Posted 29 November 2013 - 06:07 PM

Besides refrigerator problems, I have a 2.8 Onan generator.  It did work when i bought the 1990 Toyota mini RV. 

 

Now it starts runs 30-90 seconds then stops.  It will start right away but then dies right after starting.

 

I have changed oil(10w30) NEW AIR FILTER, AND NEW FUEL filter.  The generator has almost 600 hrs. on it.

 

None of this helped it to keep running.  Is there a fuel pump? 

 

Thanks for any help.


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#13 wolfe10

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Posted 29 November 2013 - 06:15 PM

Patsy,

 

How long since it has run successfully?

 

When you remove the air cleaner, and try to start, does the gasoline spell like gasoline or like it has "turned"?  Small carburetors are very easy to clog if the gas sits in them for a long time.


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#14 Markstella

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Posted 30 November 2013 - 09:28 AM

  • You should get a code from the lights flashing.  Count the flash pattern and check the owners manual, might help.

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#15 patsy613

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Posted 06 December 2013 - 07:39 PM

Hi,

 

I have not tried the starting  without  filter in.  It could be a carburetor problems because I use the generator so seldom but I am aware that one is suppose to start and run under load for 20 minutes once a month.  Cannot do now.  It did run last year doing the 20 min run. 

 

Would a can of fuel cleaner work? 

 

I am thinking about having it removed. 

 

I have a 135 watt solar on roof.


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#16 Elkhartjim

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Posted 07 December 2013 - 07:28 AM

I had the running and arbitrarily shutting down problem with my Onan quiet diesel genset a few years ago.  I resolved the issue when I located a loose negative (ground) cable at one of the house batteries. I cleaned and tightened the connection and haven't had a problem (with that) since.

 

Patsy613, if your genset hasn't operated since last year, you may have several reasons/causes for it not operating now.  Fuel, electric/electronic, connections, etc. Its very important to run 2 hours monthly if at all possible and it should be under 50% load-or at least that's what my manual recommends.

 

Good luck!


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Jim Sims
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Houston, TX area





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