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Where is oil filter and drain plug on Onan 4000 generator that I have on my rv

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Onan 4000 RV Generator - where is the oil drain plug?

It should have a cover on the floor bottom that is held in place with two torx (star) screws. remove the cover and you can remove the plug with a 9/16 socket.

Posted on Dec 02, 2008

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

  • 142 Answers

SOURCE: onan generator service codes

Check the spark plug and the ignition coil for good sparking.

Get the spark plug out, or with another spark plug connected to high voltage cable, outside the motor, the outer part of the plug connected to motor ground and see if spark is present at cranking.

Posted on Jul 01, 2010

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1 Answer

What is the point gap for model:CCKA-S/25830?


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1 Answer

How to fix onan 4000 that will not stay running


Check the slips rings and brushes, check the stator and rotor windings for continuity and for shorts to ground. Check PCB plug connections. After that you need a new control board

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1 Answer

Oil is being pulled from valve cover to air filter on my onan microquiet 4000 generator, what do I need to do?


63525c2e-e749-4a53-8402-d0463bb6c753.jpgThat sounds like the reed valve sticking or dirty.
You will need to take out the reed valve, clean and re-install. Be aware that a small amount of oil is common, also do not over fill the oil. The full mark is hot. Too much oil in the crakcase can build up pressure and keep the reed valve open.

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1 Answer

Onan generator service codes


Check the spark plug and the ignition coil for good sparking.

Get the spark plug out, or with another spark plug connected to high voltage cable, outside the motor, the outer part of the plug connected to motor ground and see if spark is present at cranking.

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1 Answer

Oil Leak


Need model and serial number off this unit in order to proceed.

However, if it is a KY model, with an about 2" cover underneath. That cover is blocking the oil drain plug. It is possible that the oil drain plug is leaking. Remove and drain oil into pan. Clean the plug and add plumbers tape to the plug and install. Then fill the unit back up with oil.

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1 Answer

Onan 4000 RV Generator - where is the oil drain plug?


It should have a cover on the floor bottom that is held in place with two torx (star) screws. remove the cover and you can remove the plug with a 9/16 socket.

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