Kohler-SDMO
Overfueling / Incomplete Combustion
Excessive black smoke from exhaust during operation
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Clogged air filter, Overloaded generator, Faulty injector causing overfueling, Turbocharger problem (if equipped)
How to Fix / Troubleshooting
Safety first: Ensure adequate ventilation around the exhaust. Avoid inhaling exhaust gases.
- Check load: Reduce load to within generator rating and observe if smoke decreases.
- Inspect air filter: Replace a dirty air filter element.
- Visual turbo check: On turbocharged engines, inspect turbocharger for oil leaks and ensure the compressor wheel spins freely (engine off).
- Fuel system: If smoke persists at normal load with clean air filter, suspect injector issues and arrange for professional testing and replacement.
Prolonged black smoke indicates inefficiency and can foul the exhaust system; address promptly.
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Repair Difficulty
Medium
3/5
Required Part
Air Filter Element
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