Carburetor Replace Part Number: Replaces B&S 799583, 593261, 595656, 591979, 591160 and 590556. Please verify your original part number and engine model before ordering Filter and Cover Replacement: Air Filter Replace#799579, Air Filter Cover Replace# 595660, Primer Bulb Replace# 594281 Engine Compatibility: Fits for most B&S 300E 450E 500E 550EX 500 series 125cc 140cc 08P502 8P502 09P602 9P602 Lawnmower engines Complete Carburetor Kit: Includes 1 Carburetor, 1 Air Cover, 1 Air Filter, 1 Primer Bulb, 1 Fuel Shut Off Valve, 1 Spark Plug, 2 Fuel Lines, and 2 Clamps Durable Construction and Performance: Made of durable plastic materials for reliable operation and resistance to deformation. Designed to support consistent fuel delivery and help restore engine performance while addressing symptoms such as difficult starting, unstable idling and excessive exhaust smoke Wide Equipment Application: Compatible with many Toro Craftsman MTD Lawn mower Edger and other outdoor power equipment that use B&S 500 Series vertical 4-cycle engines