Parts for Briggs & Stratton 129702-1776-B1: Carburator Parts

This is a carburetor overhaul kit for 3.5 to 4 HP Max Series Quantum and 5 HP Industrial Plus Engines. It is secured to the side or top of a lawnmower engine, depending on the manufacturer. The carburetor is crucial to the overall performance of an engine because it is responsible for mixing the right amounts of air and fuel. The fuel from the fuel tank flows through a hose into the carburetor, which allows it to drip into a bowl. The carburetor can become dirty or clogged over time for a variety of reasons. When this happens, it is often a good idea to take it apart and replace the components inside. There are other telltale signs that the carburetor needs an overhaul or repair. These include an engine that won't start, an engine that's running lean, an engine that's running rich, and one that's flooded. This high-quality carburetor overhaul kit comes with everything needed to repair or rebuild a carburetor, including gaskets, needle, float, seals, and an instruction manual. Aside from lawnmowers, it works with specific models of leaf blower/vacuums, generators, pressure washers, wood chippers, and small engines from Briggs & Stratton, Craftsman, Cub Cadet, Lawn-Boy, MTD, Murray, Simplicity, and Toro. It is an OEM product sourced directly from the manufacturer and is sold individually. Please refer to the diagram of the specific model for the correct location and application of the components.

The carburetor float is housed in the carburetor and is used to help control the fuel flow. It adjusts the needle valve and ensures that the appropriate amount of fuel reaches the carburetor bowl. This helps provide the right mixture of air and gasoline for the engine to operate at optimal performance. Over time, the float can become worn or detached, or the pin could come loose. When this happens, the flow is affected, and the engine will not operate correctly. If the float isn't working correctly on a lawnmower or another small engine, it might be time for a replacement. This replacement part is a genuine OEM product designed to be used with many Briggs & Stratton engines, including lawnmowers, pressure washers, generators, and other lawn and outdoor equipment engines. It is sold as a single unit with the metal cotter pin included. There are more than 150 compatible machines that this unit will work with. If your lawnmower isn’t working as it should or if the float has come loose and can't control the flow appropriately, this OEM replacement can get things back in working order.

The carburetor has a float valve to control the flow of fuel from the tank to the reservoir. A float valve has three main components - a float, seat, and a needle. When there is adequate fuel level in the carburetor, the float will rise, prompting the needle to close against its seat and prevent overflowing. If the float valve is malfunctioning, it may overflow the carburetor. In some cases, it doesn't provide ample fuel into the carburetor. If you suspect that the needle and seat are faulty, don't waste another moment. Over time, a defective needle and seat can lead to more expensive repairs like a leaking carburetor and even an engine misfiring. For a genuine OEM replacement, get this Midwest Engine 398188 Needle & Seat Kit. Please take note that the Midwest Engine 398188 Needle & Seat Kit only comes with the needle and seat. If you also need a genuine Midwest Engine float replacement, you will need to purchase it separately.

A carburetor on a lawn or garden appliance often has a float-feed chamber or bowl mounted on one side. This is a miniature fuel tank that takes a trickle feed from the main fuel supply. A carburetor is unable to use fuel that is under pressure, so the float chamber keeps everything at atmospheric pressure. When any sort of dirt or debris enters the fuel and air passages, it can cause an array of issues. The debris may enter due to shrinkage of O-rings and gaskets, and that is why a replacement gasket is essential. A carburetor screwdriver is essential when making this repair. Replacing it involves removing several pieces of the carburetor assembly, including a float assembly, inlet needle valve, and the old fuel bowl gasket itself. This authentic replacement carburetor bowl gasket will fit a small engine carburetor bowl on wood chippers, leaf blowers, pressure washers, tillers, snowblowers, lawnmowers, and small engines. It is compatible with Briggs & Stratton, Toro, Simplicity, Lawn-Boy, Cub Cadet, and Snapper, among others.

The choke return spring is a part that is used on many small engines in lawn and garden equipment. The part is a component in the choke system that ensures that the correct tension is applied to keep the choke lever in the appropriate position. If the choke return spring is broken or begins to malfunction, the lawnmower may have issues keeping power and running correctly.If the choke return spring is damaged or weak, it will prevent the choke from returning to the correct position. This can cause the engine to speed up and accelerate more quickly than desired. The air filter housing will need to be unscrewed to access the choke return spring. Take the wire off the spark plug and remove the boot from the plug. Remove the spring from the linkage and then clip on the new one. Replace the other components to get the equipment to work again.This choke return spring is an authentic OEM replacement part directly sourced from the manufacturer. It is sold individually. The spring is compatible with various wood chippers, lawnmowers, and pressure washers by Briggs and Stratton, Simplicity, Toro, Lawn-Boy, and Cub Cadet.

This OEM intake manifold o-ring seal is placed between two rigid parts to retain the pressure. It is manufactured from a flexible material that allows the o-ring to create a tight seal between the two parts. A new intake manifold o-ring seal may be needed if the o-ring itself is broken or worn and is not able to create a tight seal. Signs that the o-ring seal has gone bad is if the engine is overheating or the engine misfires or decreases in power during use. Remember to wear gloves when operating or performing care and maintenance on any outdoor power equipment machines.This genuine Midwest Engine part is sourced directly from the manufacturer and sold individually. This intake manifold o-ring seal is used on various lawnmowers and outdoor power equipment products manufactured by Midwest Engine, Briggs & Stratton, Toro, and Lawn Boy.