Parts for Briggs & Stratton 40S877-0021-G1: Cylinder Head / Intake Manifold Parts

This cylinder head is a genuine Midwest Engine part, sold individually. This cylinder head can be used as a replacement part in a lawn mower. The purpose of the cylinder head in a lawn mower is to regulate the airflow for the small engine so that the air is directed through the proper valves.The cylinder head in a lawn mower might be subject to damage within the standard lifespan of the appliance, and if this damage reduces or negates the functionality of the cylinder head, the cylinder head should be removed and replaced by this genuine OEM replacement part. Signs of a malfunctioning or damaged cylinder head can include white smoke pluming out of the exhaust, engine overheating, or discolored oil. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. Always unplug the appliance before performing any kind of repair or replacement.This component is a genuine OEM replacement part sourced directly from the manufacturer. It is sold individually. This cylinder head is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Cub Cadet, and Simplicity.

Here is a metal cylinder head screw replacement that is compatible with a wide range of engines. The screw is typically used as a means to fasten various components together in the engine. This includes securing the cylinder head components. However, it could be used for other applications in some machines. Owners can check their diagrams to see how and where the screws are used. The cylinder head screws are subject to the usual wear and tear, as well as corrosion. When the threads are stripped, they begin to corrode, become bent, or are otherwise damaged, they should be replaced. Replacing the screws tends to be a fast and simple repair. This genuine OEM cylinder head screw is made from high-quality durable metal. It is sold individually, so buyers may want to purchase several at the same time. The screw can be used in a range of machines including lawn mowers, snowblowers, leaf blowers, wood chippers, generators, tillers, pressure washers, and other small engines. Brands with compatible models include Briggs & Stratton, Toro, Cub Cadet, Murray, Lawn-Boy, Simplicity, and MasterCut.

This exhaust valve is a genuine Midwest Engine part, sold individually. This exhaust valve can be used as a replacement part for a variety of small engine outdoor appliances including lawn mowers, snowblowers, lawn tractors, and wood chippers. The purpose of an exhaust valve is to provide a channel for the burned gas to pass outside of the appliance and out into the air.The exhaust valve might have to be replaced at some point if it can no longer provide a passageway for burned gas to pass through on its way out of the appliance. If the exhaust valve has been blocked up, punctured, cracked, or warped, the component should be removed and replaced by this genuine OEM replacement part. It is a simple repair process that will take only a few minutes. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. Always unplug the appliance before performing any kind of repair or replacement. Sourced directly from the manufacturer, this component is a genuine replacement part that is sold individually. This exhaust valve is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Cub Cadet, MTD, and Simplicity.

A keeper valve is a small piece of hardware used to help to secure a valve. It is designed for use with pieces of outdoor lawn and garden power equipment that have small engines, a lawn mower, a snowblower, and a wood chipper. It is compatible with products by brands such as Briggs & Stratton, Craftsman, Toro, Cub Cadet, Lawn Boy, MTD, and Simplicity.The keeper valve fits into a groove in the end of the valve stem to secure the valve spring, valve spring retaining washer, and valve stem together. It is only natural that, over time, the keeper valve may wear out from regular exposure to the elements, get damaged, fall out, or become lost. In any of these events, a replacement will become necessary.The replacement or repair process of the keeper valve should be straightforward, but the user replacing the part should always be sure to wear gloves during any assembly, replacement, or installation processes. The user should also refer to the owner's manual of their equipment and any guiding diagrams that clarify the placement location. This keeper valve is an original OEM part sourced directly from the manufacturer, Midwest Engine. It is sold individually.

The spark plug helps to start the engine by creating the spark that will cause the fuel to ignite in the engine during combustions. Over time, the spark plugs will become worn down and go bad. Multimeters are typically used to test the spark plugs. However, owners should also regularly look at the spark plugs to search for signs of corrosion that could indicate they are going to go bad. If they are not functioning properly, the engine will not fire and start. They will need to be replaced. This is an OEM replacement part that can be used on a range of small engines and lawn equipment from many brands. Compatible brands include Toro, Briggs & Stratton, Craftsman, Cub Cadet, Simplicity, and Snapper.

O-rings are used in various locations and applications to seal and protect connections throughout the engine. The O-ring is typically used for rigid connections where a proper seal is required for optimal functioning. It is critical to have the right size and style of O-ring installed for proper operation. These parts tend to wear over time and that can affect their ability to seal. If O-rings are degraded or damaged in any way, they need to be replaced as soon as possible to prevent further damage. This O-ring is manufactured to exact specifications by Briggs & Stratton to provide a genuine OEM replacement. It can be used in various Toro, Briggs & Stratton, and Lawn-Boy engines. Typically found in lawn tractor engines, this part is compatible with more than 150 machines. This O-ring is made from durable materials and sold individually. Always disconnect the spark plug before beginning engine work and wear gloves for hand protection.

The spark plug boot is a rubber piece that is responsible for connecting the spark plug to the spark plug wires and completing the connection. Spark plugs are necessary to create the engine spark that will start the motor in lawn equipment and other small engines. The boot holds the terminal and keeps everything protected from the elements and insulated so that it continues to work correctly. If the spark plug connection seems weak or if the existing boot is damaged, this replacement could provide the solution. This durable rubber boot will insulate the spark plugs and help any small engine run better. This spark plug boot replacement can be used with a number of Briggs & Stratton engines and is compatible with hundreds of different machines from Toro, Lawn-Boy, and Briggs & Stratton. This boot replacement is sold individually as a single piece and does not include the terminal or any other housing or materials.

This replacement part is a nut. This part is small but important in various types of equipment. Nuts are able to work with other small parts such as washers and screws to secure equipment components in place.If a nut has become stripped or worn down over time, it is possible that it can no longer perform the function needed. Be sure to wear work gloves when working with small parts such as nuts to prevent injury during the repair. This is a genuine OEM replacement part manufactured by Midwest Engine. This part is sold individually.

This replacement valve seal is a genuine OEM part for a lawn tractor or mower. The valve stem is a type of valve that transfers oil into the cylinder and then immediately reseals due to the pressure in the chamber. However, if the seal is damaged, it will not close and oil will leak into the cylinder. If this happens, the cylinder head may become overly lubricated and not run well. This seal helps prevent that from happening. It fastens to the intake valve and valve stem keeper. Seals will naturally wear out over time due to stress and exposure to corrosive oxidizing agents in an engine. When this happens, the valve will leak oil. To test if the valve seal is compromised, look for whitish-grey smoke that indicates burning oil and also measure to see how much oil the engine is consuming. If the seal is breached, use a screwdriver and socket wrench set to change out the part. This top of the line replacement valve seal is compatible with Briggs & Stratton, Toro, and Lawn Boy lawn tractors. It is sourced from the original manufacturer and ships individually.

This replacement exhaust gasket is a certified genuine OEM part for a lawn tractor engine. This gasket helps to seal off the exhaust from the carburetor. For an engine to run, it must first mix fuel with air to prepare the fuel for combustion. By sealing off the exhaust, this gasket allows for fresh air to enter into the carburetor from outside the engine rather than from the exhaust. Gaskets often degrade over time due to the stress of pressure and heat. If the exhaust gasket breaks its seal, it can affect the engine's overall performance. Be on the lookout for an especially noisy engine that doesn't provide as much power and is less fuel efficient. There may also be a noticeable burning smell coming from the engine. To replace the exhaust gasket, use a socket wrench and wrench set to remove the air filter and blower housings, then remove the exhaust manifold and switch out the gasket. This replacement exhaust gasket is compatible with engines made by Toro, Briggs & Stratton, Murray, Snapper, and Simplicity. It comes sourced directly from its original manufacturer and does not include any additional hardware.