Parts for Briggs & Stratton 21B977-4155-B1: Carburetor, Fuel Supply, Kit - Carburetor Overhaul Parts

Intake gasket seals the connection between carburetor and engine block. Replace if you notice air leaks, rough idle, or poor performance. Confirm fit with your engine model number.

This genuine OEM replacement intake manifold gasket for a small gas-powered lawn appliance motor acts as a seal between two engine components, like any other gasket. However, the intake manifold gasket is one of the most necessary gaskets because it is responsible for sealing the engine vacuum and coolant. Intake manifold gaskets can be damaged because of their location in the engine. If the engine has been running hot for a while, the metal can expand and crush the gasket, causing it to fail. If this happens, the engine will begin overheating, as coolant can no longer reach the areas where it is needed. Replacing an intake manifold gasket will mean removing the air filter and its housing, the oil drain tube, blower housing, breather tube, and carburetor. Making this repair requires a set of socket wrenches and screwdrivers. This part is compatible with a wide range of mowers, chippers, and blowers from Briggs & Stratton, Toro, Cub Cadet, MTD, Simplicity, and Lawn Boy. It is sourced from the original manufacturer and ships individually.

Mounting screw for lawn and garden engines. Secures engine components and covers. Replace if stripped, corroded, missing, or damaged during maintenance.

Engine stalling at idle? This idle speed kit prevents stalling when the engine isn't in motion. Essential repair for lawn tractors and garden equipment.

Float hinge pin for lawn and garden engines. Secures the carburetor float assembly. Replace if bent, worn, or missing to restore proper fuel flow regulation.

Engine flooding or not starting? This metal float needle valve regulates fuel flow in your carburetor. Controls gas intake and outflow in the fuel bowl.

Fix engine fuel overflow or starting issues caused by a stuck or deteriorated carburetor float valve needle. Common repair for lawn mowers and snow blowers.

Carburetor inlet seat for lawn and garden engines. Installs in the carburetor fuel inlet. Replace if cracked, worn, or causing fuel leaks.

Fix rough idle, hard starting, or stalling issues with this carburetor overhaul kit. Includes gaskets, seals, and components to restore fuel delivery.

Here is a replacement carburetor float for small engines used on lawn mowers and other machines. The carburetor combines air and fuel, ensuring that the engine has the right mix for combustion and performance. The carburetor float plays a critical role in that process by helping to ensure that the optimum level of fuel stays in the chamber. As the fuel level rises and falls, the float does as well, operating the fuel needle and replenishing or slowing the supply of gasoline. Over time, carburetor floats can degrade due to exposure to gasoline and high temperatures. A sticking carburetor float is a sign that it needs to be replaced. The engine may sputter, may rev high, or may choke itself out. Replacing the carburetor float will require removing the air box, the air cleaner element, the fuel line, and the carburetor itself. The carburetor bowl must be removed to access the old float and replace it with a new one. Note that this is a new OEM carburetor float designed to fit Briggs & Stratton engines on over 150 different yard machines from brands like Murray, Toro, and Lawn-Boy. It is sold individually.

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.

Seals the carburetor float bowl to prevent fuel leaks. Replace if you notice fuel leaking or excessive fuel consumption. Confirm fit with your model.

This genuine Midwest Engine fuel line directs fuel into the carburetor, which creates the mixture of fuel and air that powers the lawn tractor or a lawn mower.Fuel lines are likely to suffer damage as a result of the dirt, debris, pebbles, and gravel that might be flung around in the air and onto the lawn mower or lawn tractor during use. If punctures, tears, rips, warping, or erosion of the part occurs, the fuel lines must be removed and replaced immediately. Operating a lawn mower or lawn tractor without a functional fuel line can impact fuel economy or even cause dangerous fuel leaks. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This fuel line is compatible with the following brands: Midwest Engine, Briggs & Stratton, Cub Cadet, Simplicity, and Toro. This part is sold individually.

Delivers fuel from tank to carburetor on small engines. Replace when cracked, brittle, or leaking to restore proper fuel flow. Verify fit with model.

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

Replace your engine fuel line if you notice fuel leaks, cracking, or hardened hoses. Connects fuel tank to carburetor. Common DIY repair for lawn mowers.

Seals carburetor float bowl bolt to prevent fuel leaks on lawn mower engines. Replace during carburetor overhaul for proper seal. Verify fit with model.

Replacement mounting screw for small engines. Secures engine components and covers. Order a new screw if yours is stripped, missing, or damaged.

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.

This is an O-ring seal that can be used in many types of engines for lawn and garden equipment. It is responsible for sealing the connection between the cylinder head assembly and the intake manifold. The sealing process prevents dirt and debris from moving throughout the equipment and getting into the motor. As time passes, the O-ring seal can shrink, causing oil or air leaks and decreasing engine performance.When the O-ring is damaged, clogged, worn, or broken, it will need to be cleaned or replaced before using the lawn equipment again. The damaged or broken O-ring seal can be removed using a flat head screwdriver. After it has been removed, the replacement component can be installed in the same place. Make sure that the O-ring seal is properly seated to avoid additional leaks. Reassemble the parts before using the tool. This is a genuine OEM replacement part that is sourced directly from the manufacturer. It is sold individually. It is used in lawnmowers, lawn tractors, snowblowers, and wood chippers manufactured by Simplicity, MTD, Lawn-Boy, Cub Cadet, Toro, and Briggs & Stratton.

Fuel tank cap seals your engine's fuel tank and maintains proper pressure for combustion. Replace if cracked, loose, or leaking. Verify fit with model number.

Stop fuel flow to your engine with this shut-off valve. Conserves fuel and improves safety. Easy install for better fuel system control. Fits 1/4-inch fuel line.

Fix engine stalling or rough running caused by fuel delivery issues. This float bowl mounts to your carburetor and regulates fuel supply to the engine.

Seals and protects engine connections to prevent oil leaks. Replace when cracked, brittle, or leaking. Verify fit with your engine model number.