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What should you do if your kerosene lamp keeps going out?

April 5, 2026

Quick Answer

If your kerosene lamp keeps going out, ensure you're using the correct wick size and adjusting the wick height to achieve a smooth, steady flame.

Adjusting the Wick

The wick size and height play a crucial role in maintaining a consistent flame. For a typical 12-ounce kerosene lamp, use a wick with a diameter of 1/4 inch (6-7 mm) and trim it to an optimal length of 1/2 inch (1.3 cm) above the fuel. This setup allows for a smooth, steady flame and prevents excessive wick curl, which can cause the lamp to go out.

Maintaining a Clean Mantle

A dirty or clogged mantle can significantly reduce the lamp’s performance and cause it to go out. To maintain a clean mantle, gently wipe it with a soft cloth or a cotton swab soaked in kerosene. Avoid using abrasive materials or harsh chemicals, as they can damage the mantle. Cleaning the mantle every 10-20 hours of operation can help ensure a consistent flame and extended lamp life.

Optimizing the Fuel-to-Air Ratio

The fuel-to-air ratio is critical for maintaining a steady flame. Experiment with different wick trim lengths to find the optimal balance between fuel consumption and airflow. Generally, a 1/2-inch (1.3 cm) wick trim length strikes a good balance for most kerosene lamps. However, you may need to adjust this length depending on the specific lamp model, ambient temperature, and fuel quality.

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