- 1). Unscrew the gas tank lid on the Briggs & Stratton lawn mower engine. Make sure there is fuel in the tank. Many people overlook that the engine may have simply ran out of gas.
- 2). Follow the fuel hose under the gas tank to the side of the carburetor on the Briggs & Stratton engine block.
- 3). Unscrew the clamp holding the fuel hose onto the carburetor with the flathead screwdriver. Pull the hose off and push it into the gas tank to prevent any gas spilling out.
- 4). Spray carb cleaner into the side of the carburetor for 10 to 15 seconds. If the mower engine did start, but died as if it was running out of gas when there was plenty of gas in the gas tank, then the carburetor is most likely clogged with dirt and gummy old gas and the carb cleaner will thin it out and allow it to be burned in the piston chamber via injection.
- 5). Push the fuel hose back onto the side of the carburetor and tighten the clamp back down. Screw on the gas can lid.
- 6). Unscrew the air filter cover from the side of the Briggs & Stratton engine with the screwdriver. Pull out the old air filter and inspect it for oil and debris. A dirty air filter won't allow proper air intake for the engine and therefore it won't allow the engine to run or start. Replace the air filter with a new one and tighten the cover back on.
- 7). Pull the cap off of the spark plug on the front of the Briggs & Stratton engine block. Unscrew the spark plug with the proper sized socket. Inspect the spark plug tip to ensure the spark plug gap isn't clogged with oil and carbon. The spark plug won't fire and will prevent the engine from starting if the tip is dirty. Finger tighten a new spark plug into the engine block. Put the socket you used to unscrew the spark plug on the foot pound torque wrench and tighten the new spark plug in at 15 ft-lbs on the wrench meter. Push the spark plug cap back on.
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