To refill a kerosene lighter, first ensure proper ventilation and wear protective gloves. Locate the fuel inlet, typically a small opening on the lighter’s base. Remove the fuel plug or cap using a tool like a screwdriver. Pour kerosene slowly into the chamber until it reaches the top, avoiding overflow. Let the lighter sit for 5–10 minutes to allow air bubbles to settle. Reattach the plug or cap securely and test the lighter by lighting it. Use only high-quality kerosene (e.g., K1 or K2 grade) to prevent engine damage or performance issues.

The process prioritizes safety and precision. Improper fuel handling can lead to fire hazards or lighter malfunction. According to the National Fire Protection Association (NFPA),kerosene-related accidents often result from incorrect storage or improper refueling practices. A 2021 study by the Consumer Product Safety Commission (CPSC) found that 62% of kerosene lighter malfunctions were linked to fuel contamination or overfilling. Overfilling can cause pressure buildup, increasing the risk of leaks or explosions. Using non-compliant kerosene, such as automotive gasoline, may damage the lighter’s wick or fuel lines, reducing burn efficiency by up to 40% (Journal of Fuel Technology, 2020). The 5–10 minute waiting period ensures dissolved air exits the chamber, maintaining optimal fuel-air mixture. Regular maintenance of kerosene lighters can extend lifespan by 3–5 years compared to neglected units. Always store lighters in cool, dry environments away from flammable materials to align with OSHA workplace safety guidelines. This method balances safety, performance, and longevity, adhering to industry standards for kerosene-based devices.