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My onan k450 runs 4 about 5mins then stops - Electrical Supplies

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Onan generator cranks then wines no start i have a onan generator in my motorhome it stop running now when i try to start in it turns over but does not run what should i9 cheack


check oil level in the sump
if the oil level is correct check for a problem oil level sensor circuit
it is there to stop the engine when the oil level reaches critical level

Dec 12, 2016 | Electrical Supplies

1 Answer

Onan marquis gold gas generator 5500 stops running after 5 minutes


Check fuel pump pressure, how long has it sat. What load is on after it stops?

Jun 10, 2014 | Onan Marquis Gold Quiet Gas Generator 5500...

1 Answer

Have a k450 onan gen will only run with choke almost closed


My K450 onan tag along was doing this and an adjustment of the governor set screw ( voltage +/- )cleared it up.

Oct 01, 2013 | Electrical Supplies

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Onan 4000 generator


Check the rotor slip rings and brushes first, the rings should be clean and bright

Jun 24, 2013 | Watts Onan Portable Generator - 4000 ,...

1 Answer

Starts runs for a minutes quits but if you keep pushing the start button it keeps running


You say Guardian that is Generac???? Then you indicate Onan 4.0KY. If it is a Onan and it stops after you release the button there are a couple of things. 1 st check the brushes, and polish the rotor slip rings, check the resisitance of the rotor, the electrical harness plugs are tight. The control requires a voltage feedback while cranking to engage the PCB run circuits, if all those check out you have a bad control board.

Feb 15, 2013 | Onan Cummins 4.0 KY-FA/26100 RV QG 4000...

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Have a 2.0kva-fr/26119 onan genorator which runs for 5 minutes and stops can you be of any help


If it stops after 5 minutes whether under load or not, and assuming the air filter, plugs, and fuel filter are new and or clean. The fuel pump is suspect. If it is in a motorhome try conencting it to an external fuel source that is at the same height as the generator. Then higher than the generator. If the problem persisits replace the fuel pump. Or just check fuel pump pressure with a gauge. BE CAREFUL do not use an automotive fuel pump Onan have special low pressure pumps, so use OEM part

Nov 13, 2012 | Onan Cummins 300-5332 Generator Switch and...

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Lost electric power to fuel pump on Onan Generator


there should be a fuse at the housing by the start/stop switch. if deisel then take the 10mm screw out of the coolant cap cover and check those fuses. verify power after. good luck.

Jun 05, 2009 | Watts Onan Portable Generator - 5000 ,...

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