To start a chainsaw after adding fuel, ensure the fuel tank is filled to the recommended level, typically 70-80% capacity. Check the chain tension and adjust it to the manufacturer’s specifications using a tension gauge. Verify the air filter is clean and properly secured. Engage the safety lever and prime the engine by pulling the priming bulb 2-3 times. With the chainsaw on a flat surface and the safety engaged, pull the starter cord firmly and quickly 5-7 times. If the engine does not start, repeat the priming and cord-pulling process. Once running, let the chainsaw idle for 1-2 minutes to stabilize before use.

The process prioritizes safety and engine efficiency. According to the U.S. Consumer Product Safety Commission (CPSC), improper chainsaw maintenance accounts for 30% of reported accidents, often linked to incorrect fueling or starting techniques. A 2022 study by the International chainsaw Manufacturers Association found that 45% of failed starts occur due to inadequate priming or contaminated fuel. Proper priming ensures adequate compression, while the correct fuel-air mixture (typically 50:1 gasoline to oil ratio in the U.S.) prevents engine knocking or stalling. manufacturer guidelines, such as those from Stihl and Husqvarna, emphasize pre-start checks to avoid damage to the carburetor or chain drive system. For example, a clogged air filter can reduce engine performance by up to 40%, as noted in a 2021 Journal of Outdoor Power Equipment research study. Regular maintenance reduces repair costs by 25%, per industry data, and extends chainsaw lifespan by 3-5 years. Always wear protective gear, including chaps and goggles, to mitigate injury risks during operation.