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Compatibility
This part will fit the following 421 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs & StrattonBriggs & Stratton 31P777-0137-B1 - Briggs & Stratton Vertical EngineCamshaft, Crankshaft, Counterweight, Cylinder, Engine Sump, Gasket Set - Engine, Operator's Manual, Piston, Rings, Connecting Rod,
Briggs & StrattonBriggs & Stratton 31P707-0241-B2 - Briggs & Stratton Vertical EngineCamshaft, Crankshaft, Counterweight, Cylinder, Engine Sump, Gasket Set - Engine, Operator's Manual, Piston, Rings, Connecting Rod,
Briggs & StrattonBriggs & Stratton 31P707-0124-B1 - Briggs & Stratton Vertical EngineCamshaft, Crankshaft, Counterweight, Cylinder, Engine Sump, Gasket Set - Engine, Operator's Manual, Piston, Rings, Connecting Rod,
Briggs & StrattonBriggs & Stratton 31P777-0366-B1 - Briggs & Stratton Vertical EngineCamshaft, Crankshaft, Counterweight, Cylinder, Engine Sump, Gasket Set - Engine, Operator's Manual, Piston, Rings, Connecting Rod,
Briggs & StrattonBriggs & Stratton 31P777-0002-G6 - Briggs & Stratton Vertical EngineCamshaft, Crankshaft, Counterweight, Cylinder, Engine Sump, Gasket Set - Engine, Operator's Manual, Piston, Rings, Connecting Rod,