Parts for Briggs & Stratton 401577-5129-B1: Carburetor, Fuel Supply Parts

This is a carburetor float that is used in a wide variety of lawn and garden equipment. The carburetor float is used in the engine to close and open the float needle valve. The main responsibility of the carburetor float is to open up to allow fuel into the carburetor when drained and to shut off the flow of fuel if the bowl is filled. If the float isn't working properly, the engine may not idle, the carburetor can flood, and the motor may stall while the tool is in use.Before replacing the carburetor float, put on work gloves and disconnect the spark plug wire. The carburetor will need to be removed from the equipment. The carburetor float and any other malfunctioning parts can be taken out and replaced with new components. While working on the parts, the jets can also be cleaned as a maintenance process.This carburetor float is sold as an individual item. It is an authentic OEM replacement part sourced directly from the manufacturer. The float is designed to be used with lawnmowers, lawn tractors, wood chippers, and snowblowers manufactured by Cub Cadet, Briggs & Stratton, MTD, Toro, and Simplicity.

When the fuel in a small, gasoline-powered engine moves up the fuel line, it must be mixed perfectly with air and together burn in just the right mixture and amount in order for engines to function properly. Because too much gas might be coming into the carburetor or because there might be a need for more gasoline than can readily move up the fuel line, the carburetor has a small device called the float bowl. The float bowl has a ready supply of gasoline for use as needed by the carburetor. To keep the gasoline in check while all this is happening, a device called the float bowl gasket keeps all the elements separate. With use and age, sometimes these gaskets crack or grow brittle and must be replaced. This causes air to leak into the mix and the engine will not operate smoothly. Replace this gasket with a genuine OEM replacement part like this one, manufactured to be exactly like the factory original that is being replaced. This part is compatible with engines sold by Toro, Simplicity, MTD, Briggs & Stratton, and Cub Cadet. Part sold individually.

Mower won't start or runs poorly? Cracked or leaking fuel lines prevent proper fuel delivery. Simple 15-minute DIY repair restores engine performance.

Filters contaminants from fuel to protect your engine. Replace annually or if engine runs rough, won't start, or loses power. Verify fit with your model.

Piston ring set for small engines. Replaces worn or damaged rings that allow compression loss. Essential for engine rebuilds and restoration projects.

Flange screw for lawn and garden engines. Distributes connection force over a larger area. Replace if threads are stripped, head is damaged, or screw is missing.

Replace your fuel pump if no gas reaches the carburetor or engine won't start when hot. Channels fuel through line to tank. Uses 1/4" fuel line.

Secures hoses in your engine to prevent fuel and oil leaks. Replace when rusted or damaged to avoid engine malfunction. Verify fit with your model number.

Engine won't shut off properly or runs rough? This fuel solenoid controls fuel flow to the carburetor. Fixes tractor dieseling and backfiring issues.

Replacement mounting screw for lawn and garden engines. Secures engine components and housing. Needed when original fastener is stripped, lost, or damaged.