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 > Onan oil change now not running

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kx125str99

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Posted: 02/05/18 05:18pm Link  |  Quote  |  Print  |  Notify Moderator

Hey guys I have an Onan microquiet 4000. Generator ran fine. Did an oil change and cleaned air filter and hasn’t ran since. Cleaned the carb and still won’t run correctly. It fires and runs for about 5-10 minutes then just instant die. Any ideas greatly appreciated.

kx125str99

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Posted: 02/05/18 05:26pm Link  |  Quote  |  Print  |  Notify Moderator

And changed the spark plug during oil change. After wouldn’t run even swapped back in the old plug. No go still.

azrving

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Posted: 02/05/18 05:33pm Link  |  Quote  |  Print  |  Notify Moderator

Is the oil overfilled? I've seen low shut down engines also die because of too high an oil level.

Lwiddis

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Posted: 02/05/18 05:54pm Link  |  Quote  |  Print  |  Notify Moderator

Yup. Overfill is a bad act.


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j-d

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Posted: 02/05/18 06:09pm Link  |  Quote  |  Print  |  Notify Moderator

So it's a 4KY? What is the Spec, the Letter at the end of Model Number? They're a splash-lubed motor like a mower, and the Oil Sensor was deleted before ours, made in 2002 and Spec "K" so odds are the oil change didn't do it. Unless maybe it's overfull and oil got where it shouldn't be.
Did you have the Carb off? Pretty easy to goof the linkage up.
Anyhow, please post the full Model (with Spec) and Serial. If we're lucky enough for a generator tech to drop by, s/he will want it.


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mobeewan

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Posted: 02/05/18 07:38pm Link  |  Quote  |  Print  |  Notify Moderator

How about the possibility not enough oil has been put back in and the low oil shutdown is keeping it from starting?

John&Joey

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Posted: 02/05/18 08:18pm Link  |  Quote  |  Print  |  Notify Moderator

Another possibility is oil pressure. Asked for dino W30 and W5-30 full syn was used. Can't build up enough pressure.

road-runner

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Posted: 02/05/18 09:22pm Link  |  Quote  |  Print  |  Notify Moderator

The correct oil pressure is zero. It's a splash system.


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cooper841

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Posted: 02/06/18 03:49am Link  |  Quote  |  Print  |  Notify Moderator

Check fuel pump


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Kpackpackkelley

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Posted: 02/06/18 05:44am Link  |  Quote  |  Print  |  Notify Moderator

When it dies pull the spark plug to see if it’s wet from gas maybe flooding. There’s a small washer inside the carb bowl in the bottom did you get it back in .

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