Watts Onan Portable Generator - 4000 , Model# 5500 Logo

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Anonymous Posted on Aug 22, 2013

Onan 3600 propane gen wont start without excessive cranking time, 20-30 seconds then start sluggishly. seems to work fine after it starts.

1 Answer

Renee F

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  • Watts Expert 573 Answers
  • Posted on Nov 17, 2013
Renee F
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Joined: Oct 15, 2013
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Sounds like low compression. Check the compression or have a small engine shop do a leakdown test on it for you

5 Related Answers

mamicheddy

mamicheddy

  • 79 Answers
  • Posted on May 12, 2009

SOURCE: I have an onan 2800 gen that will not charge

If the govenor didn't work that means that you placed the linkage on the carberator the wrong way. This will cause the genset to overspeed and possibly stop the genset from creating voltage. If the genset does not create voltage then you won't have a charger. Fix the linkage first by looking to make sure that the throttle plate is closed before starting genset. Once you start the genset check for voltage.

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Anonymous

  • 77 Answers
  • Posted on Aug 10, 2009

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.

Anonymous

  • 1 Answer
  • Posted on Aug 14, 2009

SOURCE: wont keep running after start button is released

I have a honda generator that is not putting out any ac voltage. It was working fine but when the power came on, it did not get unpluged and after that, I had no a/c voltage. How can I troubleshoot either the regulator or circuits?

Anonymous

  • 6 Answers
  • Posted on Sep 28, 2009

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

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

Anonymous

  • 16 Answers
  • Posted on Jan 15, 2010

SOURCE: Onan Marquis Gold 5.5 HGJAB 1038C. Won't start.

Test the solinoid with an ohms meter and if the circuit is open replace the solinoid.

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1answer

I have a 2006 winnabago with onan marquis gold 6500 lp generator that won't start

Check the Onan web site for troubleshooting. Otherwise it's probably time to go to an RV center to have them check it out.http://www.cumminsonanstore.com/
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1answer

Onan Propane Generator Problems

Is the generator coming up to proper speed? A cycles (hertz) (should be 60 in USA) meter will tell.
If it is up to speed, see if a UPS unit is made powerful enough to power the microwave. That will handle the initial starting load from the microwave.
UPS units are handy to power stuff while you are getting the gen going.
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1answer

Onan propane generator starting problem

There can be numerous reasons why and is difficult to diagnose without more information. Assuming plugs filter etc are fine and new or clean and gapped. One thing I would check would be the LP pressure going into the unit, Then check the demand regualtor. You did not mention if it keeps running when it finally starts. Over time the demand regulator can accumulate a heavy wax preventing the diaphragm from opening. This wax is the result of a lubricate LP gas companies have in the gas. It can make starting harder, then result in it not starting at all. Regulators typically should be replaced and not serviced due to the high possibility of gas leaks. Hope this helps www.advanced-power-technologies.com
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I have an Onan 3600 microquiet lp. I made the mistake of hooking up a jumper box to the battery with the cables crossed,now it blows the 5amp fuse that supplies power for starting. hope I didn't fry...

It certainly sounds like you have damaged the control board. If you cranked it with reverse polarity, there is a good chance that you have rotor winding damage also. If not you still may have to flash the rotor windings to ensure a correct polarized field. That involves hooking a battery for a couple of seconds to the rotor brushes (with correct polarity) with rotor brush wires disconnected. Only do this if there is no output voltage after you replace the control boards. Bad mistake :)
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1answer

Onan 4kw Emerald I generator will not crank

The gen. is not the problem, the engine start circuit is not functioning. You need to look at the starter solenoid and starter.

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