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My onan generator starts but the rpm oscillates, what could cause this issue

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If it is Gasoline check the Governor Rod Spring. This is the spring that fits over the rod to the top of the carb. If there is any play it will make the engine do this. :)

Posted on May 04, 2017

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  • Expert
  • 202 Answers

Your problem is under load? Maybe your load is unbalanced.

Posted on May 02, 2017

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Posted on Jan 02, 2017

crayzeetrayn
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SOURCE: Looking for an ONAN Emerald I GenSet generator manual

I have an account in the Buffalo NY area .. they can help you with this .. call 716-668-2666 after 9:00am EST tomorrow (sat)

Posted on Apr 03, 2009

erickg
  • 116 Answers

SOURCE: Oil type for Onan 4000 generator

SAE 15W-40 is what i used to use
synthetic? not sure about that one there may be oil pres switch that could give you a problem.

Posted on Apr 17, 2009

SOURCE: Have an Onan RV generator. WHat kind of oil do I

Standard 30W motor oil.

Posted on Apr 30, 2009

  • 77 Answers

SOURCE: onan 4000 start good runs only ten minutsand shuts down,starts up

First locate the oil pressure switch and see if you can bypass it,then see if it runs. If not check the fuel filter and fuel pump,make sure solonoid for fuel pump is kicking on.

Posted on Aug 10, 2009

  • 6 Answers

SOURCE: I have an onan 5500 gas generator that wont start

What is the model? Chances are the carb needs cleaning or replaced.

Posted on Sep 28, 2009

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1 Answer

The generator just clicks when i try to start it


It sounds like the battery is dead. Take the battery to a place like batteries plus and have them test it.

Sep 21, 2014 | Watts Onan Portable Generator - 4000 ,...

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Onan marquis 5000 model # 5bgmfa26105f runs for a few minutes and shuts off. let it cool off and it will start again. whats the problem?


There are many possible reasons from stator output voltage to sensing, to fuel to control boards. A good place to start (as the unit does run) would be with the fuel system, if it has sat a long time it won't help. Also the fuel filter. try conencting to an external fuel tank versus the vehicles, as sometimes pick up tubes in main tanks can be an issue. Also check the correct oil level and viscosity / and oil pressure switch. Failing that I recommend a service center, as there really are so many causes, I cannot list all on here.

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Did you change the pump with the correct Onan pump, these are special low pressure pumps, and automotive pump will not work and can cause dangerous flooding and carb issues.

Jun 24, 2013 | Electrical Supplies

1 Answer

Onan 5500 RV generator starting issue


Sound like a dead battery, or poor battery volatge getting to the unit. The clicking is fuel pump and or solenoid trying to pull in.

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1 Answer

When i start the onan 5500 it takes 4 or 5 times then when it does start it runs low then high rpm then low again where do i start


Adjust the carberator. You have to do this while the engine is running and it usually takes a straight slot screwdriver. You can turn a spring loaded screw to adjust fast or slow which ever is needed.

Aug 05, 2010 | Watts Onan Portable Generator - 4000 ,...

2 Answers

Onan 4 ky generator quits when a/c is turned on? Has no other load on it.


Is your generator 4 kW or 4000 Model 5500.
If 5500 as on the picture over your question the reason may be short in the receptacles or low voltage/ rpm.
If 4 kW MicroQuiet, there the reasons may be too much, that you will nead a troubleshooting manual.

Jun 14, 2010 | Watts Onan Portable Generator - 4000 ,...

1 Answer

My Onan 2800 simply won't start. Two mechanics


1 Check the oil..... i.e full

Unhook one of the wires on the oil sensor and see if you NOW have spark.

I don't know why a lawn mower shop could not fix your generator. I certainly fixed my share of them during my lawnmower repair shop days.

Half of the problems I ever saw with generators is that they for a number of reasons would not start.

Thanks for using FixYa!

Kelly

Feb 20, 2010 | Watts Onan Portable Generator - 4000 ,...

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