Parts for Briggs & Stratton 31D777-0035: Carburetor / Motor-Starter Parts

The crankcase is a metal case over the crankshaft of an engine. It is essential to the operation of the engine as it shields the crankshaft and rods from any debris. It also ensures the pressurization of the chamber and helps to keep pistons and oil moving properly. The crankshaft gasket is part of what keeps the seal and allows the engine to function. It can wear with time or even become dry and cracked. It will cause oil leakage, smoke, and even engine failure. This is a genuine OEM crankcase gasket for lawnmowers, lawn tractors, and small engines produced by Toro, Cub Cadet, MTD, Briggs & Stratton, and Simplicity. It comes as an individual component.

This screw is a genuine Midwest Engine part, sold individually. This screw can be used as a replacement part for a variety of small engine outdoor appliances including lawn mowers, snowblowers, and wood chippers. The purpose of a screw in such outdoor appliances is to provide a secure fastening for two or more components to one another through the piercing of the screw into the components and the rotation of the screw so that its placement is stable.The screw of a small engine outdoor appliance is a small component that can be easily lost or misplaced. If the screw is stripped or otherwise damaged, it should be removed and replaced by this genuine OEM replacement part. 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 is an OEM part sourced directly from the manufacturer, and it is sold individually. This screw is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Craftsman, Cub Cadet, Murray, Lawn Boy, MTD, and Simplicity.

This replacement oil drain plug is a genuine OEM part for a lawn tractor or generator engine. The oil drain plug connects to the base of the oil tank and allows the appliance owner to drain used oil and replace it with new, clean oil. The oil drain plug is threaded to screw into the oil tank and prevent it from popping out of place while the appliance is in use. The most likely reason to replace an oil drain plug is if the old plug's threading has become stripped and no longer holds onto the oil tank. Alternatively, the plug is quite small and could easily be misplaced during an oil change. If lost, oil will leak from the engine, causing parts to overheat. Fortunately, replacing a lost or damaged oil drain plug is simple and only requires screwing a new plug into place. This replacement plug is a high-quality part that fits Craftsman and Murray products. It comes sourced from its original manufacturer and ships individually, without any additional hardware.

This kit contains two knobs and dial replacing many models. Color: black. The knobs are about 2 inches in diameter. The dial is about 3 inches in diameter.

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.

The flywheel fan is attached to the flywheel and is designed to help circulate air and keep the engine cool during use. This plastic blower fan should run whenever the engine is running to ensure that the equipment doesn’t overheat. The fan may stop working over time due to regular wear or as a result of being damaged. If theflywheel fan isn’t working, the engine could risk overheating, and that could lead to many other issues. Replacing it with this genuine OEM replacement will ensure that the equipment can operate safely and at peak performance. This genuine OEM Flywheel Fan from Briggs & Stratton is designed to fit most lawn equipment engines in the 319000 and 31A000 model families. It is made with exact standards and comes directly from the manufacturer, providing peace of mind that it will always work as it should. This unit is sold individually and contains the flywheel fan and a replacement screen. The bolt required to secure the fan is sold separately.

This replacement part is an idle speed kit. This is a genuine replacement part made by Midwest Engine. This part is responsible for preventing the engine of many types of machines from stalling during idle time. A new idle speed kit might be needed if the engine stalls out when it is not in motion. This can be due to a faulty idle speed kit and should be replaced. It is important that before attempting to replace this part, the engine is completely off. This can affect the installation and cause damage to the engine. Be sure to wear work gloves when working near the engine of any machine. This part is a genuine OEM replacement part for long-lasting use. This part is sold individually and is sourced directly from the manufacturer to ensure proper fit.

This is a replacement rocker arm adjuster that is specifically designed for use in select lawn mower engines. The rocker arm adjuster attaches to the rocker arm, which is responsible for opening and closing the valves on the engine responsible for injecting fuel and air. By doing this, it impacts the horsepower and performance of the engine. Over time, rocker arm adjusters can become lost or damaged. If they are not functional or are missing, the rocker arm will not be able to open and close the valves appropriately and the engine may not function at all. This genuine OEM rocker arm adjuster is manufactured to exact standards for Briggs & Stratton engines and is designed to offer an exact replacement for the part that came with the machine originally. This part can also be used as a replacement on select models from Toro and Lawn Boy, with over 150 machines that can use this rocker arm adjuster in total. The part is made of durable materials and sold as an individual unit. No additional hardware or parts are included. Never perform repairs on a hot engine and always wear gloves for hand safety.

This genuine Midwest Engine valve cap protects the internal workings of the small engine by keeping dirt, debris, pebbles, and any other small material picked up by the appliance out of the engine. The valve cap of a small engine outdoor appliance might have to be replaced if it suffers damage or if it is simply lost or misplaced, which could allow dirt and debris swept up into the air by the appliance to enter the infrastructure of the machinery and cause internal damage. Before more severe damage occurs, it is best to remove and replace the damaged valve cap. This replacement should be done before using the outdoor appliance again, as to not run the risk of further damage. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This valve cap is compatible with the following brands: Midwest Engine, Briggs & Stratton, Toro, Simplicity, Lawn-Boy, MTD, Craftsman, and Cub Cadet. It can be used as a replacement part for the small engines of outdoor appliances such as lawn tractors, lawn tractors, snowblowers, wood chippers, leaf blowers, tillers, and edgers. This part is sold individually.

The washer seal is an essential part of the carburetor float bowl on engines with carburetors on lawn mowers. This washer prevents gasoline leaks from the carburetor by sealing the bolt to the bowl.The washer seal is normally replaced when overhauling the carburetor. Reusing the old one is not recommended. If the seal between the bolt and the bowl is not tight, gasoline could leak and cause damage to the engine or cause bodily injury due to combustion. There are normally two bolts on the carburetor bowl. Each bolt will have a washer seal. It is a good idea to replace both seals at the same time to ensure both are flush with the bowl.When replacing the washer seal, it has to be flush and tight but not overtightened. If it is overtightened, it can crack and strip, making it leak and useless. If necessary, the washer can be trimmed to make a tighter fit. After making sure the fit is flush, it slides over the bolts that make the connection from the bolt to the bowl. The bolts are then tightened.This OEM Midwest Engine washer seal is sold individually for Briggs and Stratton lawn mower and lawn tractor engines.

This is a screw that is used in many types of lawn and garden equipment, including lawnmowers and wood chippers. It comes with a black finish and is made of durable metal. The screw can be used in many locations on a tool to attach two components together. Screws can also be used in tandem with nuts, but the two components should have the same threading and finish.Screws can become damaged, break, or be stripped and will need to be replaced. Corrosion, extreme temperatures, and unexpected stress can all lead to issues with a screw. A visual inspection can indicate whether the screw should be replaced. If it does need replacement, a screwdriver can be used to remove the original screw. The new component can be placed and tightened.This screw is a genuine OEM replacement part that is sourced directly from the manufacturer. It is sold as a single component. The screw can be used with many types of lawn and garden equipment, including lawnmowers, tillers, pressure washers, leaf blowers, edgers, generators, wood chippers, and snowblowers manufactured by Briggs & Stratton, Cub Cadet, Craftsman, Murray, Wheel Horse, Lawn-Boy, MTD, MasterCut, Simplicity, and Toro.

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.

This replacement spark plug boot is used with a range of lawn and garden machine engines. The spark plug boot is also called a coil boot and an ignition boot. It creates voltage and mounts on top of each spark plug. It connects the spark plug to the ignition coil. Over time, the spark plug boot could start to wear down. This could be due to normal wear and tear or because of an issue of a faulty boot. Regardless, it will need to be replaced. If it is not working properly, it will be difficult or even impossible to start the engine. This is a genuine OEM replacement spark plug boot that is sold individually. The boot can be used with many models of Lawn Mower, wood chipper, snowblower, and other small engines. Compatible brands include Briggs & Stratton, Craftsman, Toro, Cub Cadet, Lawn-Boy, MTD, and Simplicity. Buyers should always ensure they are choosing the correct spark plug boot for their make and model.

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 oil pump cover is a genuine Midwest Engine part, sold individually. This oil pump cover can be used as a replacement part for lawnmowers, snowblowers, wood chippers, and lawn tractors. It ensures that the oil pump can deliver oil to the engine without any excessive oil leakage. Symptoms of a damaged oil pump cover can include oil leakage in and around the cover, reduced oil pressure, and oil leakage in and around the intake manifold gasket. If any of these symptoms occur and are directly attributable to the oil pump cover, the part should be immediately replaced with this genuine OEM replacement part. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This is an OEM part sourced directly from the manufacturer, and it is sold individually. This Oil pump cover is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Simplicity, Cub Cadet, Lawn-Boy, and MTD.

This authentic OEM replacement push rod connects to the camshaft on small or medium sized gas-powered lawn tractor engines, and as the camshaft turns, the push rod transfers that motion into the valves. Without a functioning push rod, the valves will not open and the engine will not work. Push rods also act as transferring units that bring oil through the valves and into the camshaft. If these parts start to stick due to poor lubrication, push rods can bend and will no longer work properly. It is also possible, though rare, for a push rod to bend due to general metal fatigue over time. To identify a bent push rod, listen for a ticking sound in the engine and look out for any slipping gears. Accessing the push rods will mean taking apart the camshaft and valves and may require the user's manual. This replacement part is sourced from its original manufacturer and is compatible with Craftsman and Briggs & Stratton lawn tractors. It ships individually.

This is an oil filter that facilitates the removal of harmful contaminants from the engine oil. This part is designed to help maintain the optimum performance of an engine in compliance with the necessary EPA emissions regulations. It is recommended that the oil filter is replaced annually or every 100 hours. Remember to prepare something to catch the oil when replacing the oil filter. The old one will need to be unscrewed to replace it, but be sure to coat the seal of the new filter with oil before installing it. To ensure that the new oil filter is in place, make sure it touches the plate it seals against by giving the filter a firm turn to tighten it down. This replacement part is an individual genuine OEM part. It is compatible with small engines, lawnmowers, generators, snowblowers, and wood chippers from Toro, Lawn-Boy, Simplicity, Snapper, and Briggs & Stratton.

This rocker arm is a genuine Midwest Engine part. A rocker arm is a vital part of an internal combustion engine that controls the intake and exhaust valves in order to direct power from the engine to the wheels, setting the appliance, such as a lawn tractor, wood-chipper, snowblower, or lawn mower in motion. Natural wear and tear from extended use over a long period of time can cause an internal combustion engine to malfunction or fall into disrepair. The longer a rocker arm is in use without replacement, the more likely it is to be subject to damage. This will require a replacement rocker arm. Signs of weakening infrastructure for which the rocker arm might be responsible can include unexplained clicking noises, stalling engines, lit-up check engine lights, and clear visual signs of deterioration on or around the rocker arm itself. Always wear gloves when handling, repairing, and operating outdoor equipment.This rocker arm replacement part works with engines, lawn tractors, wood chippers, snowblowers, and lawn mowers from brands Briggs and Stratton, Toro, Cub Cadet, Lawn Boy, Craftsman, MTD, and Simplicity.

This push rod guide is designed for use with various lawn and garden equipment motors. It has a construction of plastic and metal that fits into the cylinder head assembly. The purpose of the push rod guide is to secure the push rods and keep them in the proper position. Sometimes these guides can break, become weak, or be covered in residue and need to be replaced.If there are issues with the push rod guide, remove the spark plug before removing the air cleaner assembly, oil fill tube, fuel tank, and blower housing. Any other parts in the way like muffler guards, rewind starters, and carburetors should also be removed. Take the screws off the valve cover and remove them before pressing the spring retainer and spring over a valve. At this point, remove the push rod guide and replace it.This pushrod guide is a genuine OEM replacement part sourced directly from the manufacturer. It comes as a single part. The guide is compatible with lawnmowers, wood chippers, and snowblowers manufactured by Simplicity, Briggs & Stratton, MTD, Craftsman, Lawn-Boy, Toro, and Cub Cadet. A wrench and socket set are useful for making the replacement.

This brush retainer is part of the starter motor on many types of lawn and garden machinery. It comes with both the retainer and a set of four brushes. The main job of the brush retainer is to hold a set of carbon brushes against the commutator bars located on the armature. If the brush retainer is worn, damaged, or improperly seated, it can cause problems with the equipment. The starter motor will not be able to get the proper amount of current from the battery.If the brush retainer might be causing problems, a visual inspection can be performed. A damaged brush retainer can wear down to the wire lead and become burned, pitted, or cracked. When the brush retainer is worn out, it can decrease engine performance, reduce braking, and cause the motor to lose power. This brush retainer is an authentic OEM replacement part sourced directly from the manufacturer. It is sold as an individual part. The retainer is made to be used with lawnmowers, snowblowers, tillers, and wood chippers created by Briggs & Stratton, Craftsman, Toro, Cub Cadet, Lawn-Boy, Snapper, MTD, and Simplicity.

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.