The chainsaw small engine often has a separate model number. Use the small engine model number for a complete list of symptoms and parts. Watch our model # lookup video for help finding the model number.
The 4 most common part(s) or condition(s) which cause the symptom Chainsaw engine stops after a few seconds are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1988166
If the chainsaw engine stops after a few seconds, the carburetor might be clogged or have bad fuel in the float bowl. If old fuel was left in the chainsaw for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the small jets and ports in the carburetor and it can be difficult to burn allowing the engine to only run for a few seconds. The only solution is to drain the old fuel from the float bowl and thoroughly clean the carburetor with carburetor cleaner. If that isn't effective, replace the entire carburetor.
RepairClinic Item # 1987799
The gas cap on YOUR chainsaw is designed to let a very small amount of air into the tank. This is necessary because as fuel is consumed a vacuum is created in the fuel tank. The gas cap has a tiny vent to let air into the tank and equalize the pressure. If the gas cap vent gets clogged air can't enter the tank and eventually the vacuum pressure in the tank exceeds the vacuum pressure of the engine, and the engine stalls. The vent often cannot be cleaned because it is made of a semi porous ceramic material. If the gas cap vent is clogged, replace the cap.
RepairClinic Item # 1863323 Aftermarket (Non-OEM) part
If the chainsaw starts and stops after a few seconds The spark plug may be defective. Although this is not very common it is easy to test. Try removing the spark plug and installing a new one.
RepairClinic Item # 1993441
If the chainsaw stops after a few seconds, the fuel filter might be clogged. If old fuel was left in the chainsaw for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the fuel filter and it can be difficult to burn allowing the engine to only run for a few seconds. The only solution is to drain the old fuel from the fuel tank and replace the fuel filter.