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 5 most common part(s) or condition(s) which contribute to the symptom Chainsaw engine stops after a few seconds are listed below. Check or test each item and watch any available videos. If you are still unable to solve the problem you may need to do additional research and troubleshooting. Remember, with our 365 Days. Period.® return policy you can return any part for any reason. So, go ahead and buy it to try it. No other parts retailer offers this unconditional return policy.
For the symptom you selected, these are the most common parts or causes, ordered by the likelihood of fixing the symptom.
Inside the muffler of most chainsaws is a screen-like device called a spark arrestor. If the chainsaw stops after a few seconds or won't start at all, the spark arrestor might be clogged. The spark arrestor prevents small embers from being emitted by the engine to prevent fires. Over time the spark arrestor will become clogged with soot. Remove the spark arrestor and clean with a wire brush or replace.
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.
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.
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.
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.