Parts for Briggs & Stratton 12S972-0152-B1: Cylinder Head, Gasket Set-Valves, Valves Parts

Engine running rough or losing power? A worn exhaust valve may be the culprit. This valve controls exhaust gas flow for proper engine performance.

Intake valve for small lawn and garden engines. Replaces worn, cracked, or damaged valves affecting engine compression. Direct fit component.

Replace a worn valve retainer if your engine has compression loss or valve train noise. This washer-shaped part secures the valve spring lock on the valve.

Engine runs rough or valves aren't opening correctly? This metal valve tappet converts camshaft rotation to linear valve motion. Direct replacement part.

Seals the air cleaner to prevent unfiltered air and debris from entering your engine. Replace if cracked, compressed, or causing rough running.

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 start or runs rough? A cracked or missing spark plug boot causes misfiring and prevents proper ignition. Easy DIY replacement part.