Carburetor Replacement 594601 Key Features Regulates the air and fuel mixture for engine combustion. Direct replacement for specified engines to ensure proper fit and function. Manufactured to original equipment manufacturer (OEM) specifications for optimal performance. Includes components necessary for a standard installation. Replaces / Cross-Reference Part Numbers 594601 Compatibility & Fitment Fits select Briggs & Stratton engine models. Commonly used on engine series: 331707, 331777, 331807, 331877, 331977, 33M677, 33M777. Example equipment fitment includes Craftsman model 917288516. When to Replace Engine fails to start, stalls frequently, or runs rough. Visible fuel leakage from the carburetor body. Excessive black smoke emitted from the exhaust. Noticeable decrease in engine power or poor acceleration. Engine surges or hunts at idle or full throttle. Installation Tips Disconnect the spark plug wire before beginning work for safety. Take a photo of the linkage and fuel line connections before disassembly for reference. Always use new gaskets during installation to prevent air and fuel leaks. After installation, check for fuel leaks before starting the engine. Minor idle speed or mixture adjustments may be required for optimal performance.