121Hsv3 Parts

The flywheel key is the component on outdoor equipment that keeps the flywheel connected to the crankshaft. Over time, this key may become damaged or broken, particularly if the engine experiences a forceful stop, like hitting a large stationary object. If the flywheel key breaks, the engine will not start. A slightly damaged flywheel key is noticeable through symptoms like misfiring, backfiring, or having no power. If any of these are occurring, the flywheel key should be replaced to prevent complete engine failure.A flywheel puller tool is required for this repair. Make sure the engine is cool before working on the flywheel. Wear safety gear, including gloves and eye protection. Disconnect the spark plug and remove the blower housing. Remove the flywheel mounting nut and set it aside. Take the recoil starter cup off the mower. Use the flywheel puller to remove the flywheel and access the flywheel key. Remove the broken flywheel and replace it with the new flywheel. Reverse the steps to put the mower back together.This flywheel key is made of an aluminum alloy and is sold as an individual part. It is designed for use in lawnmowers, lawn tractors, and other small engines manufactured by Briggs and Stratton, Toro, Lawn-Boy, Simplicity, MTD, and others.

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.

This durable plastic ratchet pawl is used on select engines that feature what is known as a Susa starter. In this configuration, the ratchet pawl will be responsible for engaging the recoil starting system. Then, the starting system will allow the engine to fire. Over time, the pawl can become worn or damaged due to regular use. If this happens, the recoil can slip and cause difficulties with starting the engine. If the engine isn’t starting or you can hear it slipping when you try to fire it up, a replacement ratchet pawl could be needed. Be sure to allow the engine to cool before replacing any parts or doing any work and always wear gloves. This replacement is a genuine OEM part that includes two ratchet pawls for various Briggs & Stratton engines on small lawn equipment. This part offers compatibility with over 150 engines from Briggs & Stratton, Toro, Lawn-Boy, and Vanguard by Briggs & Stratton.

This oil seal is a common part engineered to work in engines that power generators, vacuum cleaners, snowblowers, leaf blowers, mowers, and other small engine applications. The seal sits between the crankcase and the crankshaft. It is designed as a barrier to prevent oil leakage and to stop contaminants from leaving the crankcase. When the gasoline engine exhibits diminished power, and especially if it begins to emit oily gray or bluish smoke, there is a good chance the oil seal needs to be replaced. In order to replace the faulty seal, begin by removing the starter housing and taking off the nut that holds the starter wheel to the main shaft. The user will find the old seal on this shaft. Remove it and install the new seal, pushing it into place with the edges of a socket, then tapping it securely into place with a hammer. When choosing a replacement seal, remember to use an OEM genuine replacement part that is guaranteed to match the specs for the original part. This will ensure a quality match and long replacement life. This seal is compatible with Toro, Lawn-Boy, and Briggs & Stratton engines.

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.

This filter is used for lawn and garden equipment. A dirty or clogged filter could cause the engine to run poorly.

This is a foam pre-filter that is used to help prevent dust, pollen, and other debris from clogging the air filters of small engines. One of the most common problems faced by small engines is an inadequate air supply caused by air filters that have become mired with airborne debris. Cleaning or replacing filters can become a tiresome and expensive proposition. If filters are not adequately cared for, they perform poorly, waste gasoline, pollute the air, and cause internal engine damage. A good way to help an air filter do its job is by adding a foam pre-filter in the air filter compartment. Pre-filters are exposed to all the things that clog air intakes, so periodically, they also must be replaced. Foam pre-filters are designed to fit snugly inside the housing of the air filter of virtually all small engine housings. To install a pre-filter, remove the air filter housing by taking off the one screw holding it in place. Remove the air filter from the housing and place the pre-filter inside against the exterior wall of the housing with the arrows pointing up. Reinstall the air filter. The paper of the filter should fit perfectly against the labeled side of the pre-filter. Now simply reattach the air filter housing. Genuine Midwest Engine makes this OEM replacement part, and it is sold separately.

A rewind starter, also called a recoil starter, is an assembly on many types of lawn and garden equipment used to trigger combustion in the engine. Set at the front or top of the engine, it cues the starting mechanism to turn the engine fast enough for a spark to ignite fuel in the cylinder when the handle is pulled. This part features a recoil spring connected to a pulley, and when the rope is yanked, it stretches a recoil spring. Letting go of the rope causes the spring to snap back, and the user will be able to continually pull the rope and get things moving faster and faster until there is combustion. The rope is part of the pulley system that will pull out and recoil quickly into the starter cover on top of the engine when the user pulls the starter rope’s handle. If there is no recoil or the rope gets stuck, it may need to be replaced. Without a functional starter assembly, the machine won’t work. A rewind starter kit can be used to address this issue. An authentic OEM part, it works with Briggs & Stratton and Husqvarna equipment. It contains a plastic shroud, starter pulley, starter spring, grip, the pull rope, and all hardware necessary to attach it to the machine.

This is an OEM replacement part for the recoil pulley and spring assembly, also called the rewind pulley and spring. The recoil starter, which is operated by a rope, will engage the drive cup on the flywheel, which will start the engine when it is pulled. These are commonly found on lawnmowers and similar outdoor equipment. If the rewind begins to bind when pulling the rope, or if it does not rewind easily, it could indicate that a replacement is needed. In addition, if the plastic on the old pulley is worn and cracked, it is a good idea to replace it before it fails entirely. This OEM assembly comes from the manufacturer and includes the pulley and the spring. The pulley is made from plastic, and the spring is metal. The part can be used for a range of machines and brands. The pulley and spring assembly are compatible with lawnmowers, tillers, and other small engines from brands like Craftsman, Briggs & Stratton, Snapper, Lawn-Boy, Toro, and Cub Cadet.

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.

This genuine replacement crankcase gasket creates an airtight seal on the crankcase so that oil and air do not leak out of the engine when it is running. Over time, this gasket is exposed to extreme pressure and high heat and will naturally deteriorate. It could become faulty and create leaks or it could break entirely. In either case, a full replacement of the gasket is the only solution. This OEM part can provide an exact fit for compatible lawn and garden equipment engines. This genuine crankcase gasket is manufactured to strict standards by Briggs & Stratton and is compatible with select engines on lawn mowers and generators from Briggs & Stratton, Lawn Boy, and Toro. This gasket is made of durable composite material and it is sold as an individual unit. Other gaskets, hardware, or related parts are all sold separately. The repair can be done with just a wrench, but be sure to allow the engine to cool entirely before beginning any repairs. Always wear gloves and disengage the spark plug for safety when performing engine work.

The cylinder head gasket sits between the cylinder head and the engine block. It has seals that allow the internal combustion process to occur, while also ensuring that coolant and oil do not blend as they leave the engine block and go to the head. This repair will require the use of wrenches, screwdrivers, pliers, and other equipment, and it will be necessary to purchase any other components in need of replacement at the time of the repair. This OEM cylinder head gasket replacement is a part for engines on lawn mowers, pressure washers, chipper and shredders, as well as other gas-powered devices from Briggs & Stratton, Craftsman, Toro, Cub Cadet, Lawn Boy, Simplicity, and other manufacturers.

The pawl friction plate on lawn and garden engines is an essential part of the starter assembly that is needed to crank start the machine. It provides power to the starter cup. If the engine on a machine will not start, it could be due to a broken or worn pawl friction plate. Replace the plate immediately to ensure your machine is working properly. This is genuine OEM part is compatible with a range of product types, including lawnmowers, snowblowers, tillers, pressure washers, generators, log splitters, wood chippers, leaf blowers, and chippers. Compatible brands include Briggs & Stratton, Craftsman, Cub Cadet, Lawn-Boy, Snapper, Simplicity, and Toro. The part is sold individually. Keep in mind that this only includes the pawl friction plate. It does not contain the screw or spring, and these will need to be purchased 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.