Kohler-SDMO Incomplete Combustion / Low Cylinder Temperature

White smoke from exhaust, especially on startup

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.

Possible Causes

Low compression, Faulty injectors with poor atomization, Cold engine without proper preheating, Water contamination in fuel

Safety first: Operate in a well-ventilated area. Avoid prolonged idling with heavy white smoke.

Preheat system: Verify the engine preheater or glow plugs are functioning and allow adequate preheat time before cranking.
Fuel quality: Drain water from fuel filters and check for water in the tank. Replace contaminated fuel.
Load application: After warm-up, apply a moderate load to raise cylinder temperatures and observe if the smoke clears.
Injector/compression: If white smoke persists when warm, have the injectors tested and engine compression checked by a technician.

Continuous white smoke may indicate serious engine problems; do not ignore it.

Hard 4/5

Fuel Injector Set

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