Troubleshoot your Craftsman lawnmower to determine why it doesn't start. Several of the common causes are easy fixes. If you have difficulty locating the problem, take the mower to a small engine repair shop.
Small engines mix fuel and air in the carburetor and inject it into the cylinder to burn. If the air filter clogs, the mix is too rich and the engine runs rough or does not start. Fix the problem by cleaning or replacing the air filter.
The spark plug provides the ignition source for the fuel-air mix. If the plug wire disconnects, it cannot fire. A dirty or fouled plug provides a weak spark or no spark. Check the connection. If the plug is connected, disconnect the wire and remove the plug from the engine. If it appears worn or dirty, replace it.
Make sure there is fuel in the tank. If the mower has been idle for several months, empty the gas from the tank and add fresh gasoline. As the machine sits, the more volatile compounds from the gasoline evaporate, making the mower more difficult to start. Tap on the side of the tank. If the fuel filter clogs, this often moves debris so the mower starts again.
Mowers that start and die are often suffering from unstabilized fuel that has broken down. Leaving fuel in the tank for more than a month allows the more volatile compounds to evaporate from the fuel, causing varnish to form in the tank. Other causes of this problem include leaving the packing plug in the fuel cap or a dirty air filter.Full Answer >
To start a lawn mower engine that has flooded, make sure that the tank still has enough gas in it, and then give the mower 15 minutes to let the gas in the cylinder or carburetor evaporate. It is easy to identify a flooded engine because it smells like gasoline.Full Answer >
Troubleshooting a Troy-Bilt riding mower begins with reading the troubleshooting section of the included owner's manual. Troy-Bilt also offers suggestions on its website at troybilt.com for common issues such as oil levels being too low or gas running out.Full Answer >
To perform an oil change on a Craftsman lawn mower, run the mower for a few minutes, and drain the warm oil by inverting the mower or opening the drain plug. Add 10 ounces of the correct type of oil, and check the dipstick, adding additional oil as needed.Full Answer >