Parts for Briggs & Stratton 122Q02-0125-B1: Ignition Parts

Spark plugs work by providing an electric spark in a combustion chamber, igniting the mix of fuel and air that allows the engine to turn and propel a drive shaft. Insulated with ceramic to make sure the electric charge flowing through it is properly discharged, the plug is screwed into the cylinder head. The movement of the piston sucks fuel into the cylinder until it reaches the optimum level, the compression triggering the spark plug to send a pulse that ignites the fuel and pushes the piston to the back of the cylinder. This process is repeated hundreds of times a minute in an internal combustion engine. Eventually spark plugs simply wear out, particularly if they are not properly gapped, if the fuel mixture is improper, or the engine is subject to excessive use. This plug is compatible with most lawnmowers, small engines, and pressure washers made by Briggs & Stratton, Cub Cadet, and Toro. The plug itself is a guaranteed OEM part and is sold individually.

Engine won't shut off when you turn the key? Replace your lawn mower's stop switch to restore safe engine control. Simple safety repair.

Engine won't start or runs rough? A cracked or missing spark plug boot causes misfiring and prevents proper ignition. Easy DIY replacement part.

If your small engine won't start or has no spark, a faulty spark plug terminal may be the cause. This terminal connects the ignition coil to the plug.