Parts for Briggs & Stratton 121237-0135-E1: Camshaft, Crankcase Cover, Crankshaft, Cylinder, Lubrication, Piston Group Parts

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.

This cylinder head gasket is a genuine Midwest Engine part, sold individually. This cylinder head gasket can be used as a replacement part for a variety of small engine outdoor appliances including lawn mowers, snowblowers, tillers, pressure washers, leaf blowers, and wood chippers. The purpose of the cylinder head gasket is to protect the cylinder head from the accumulation of debris by sealing it off; the cylinder head gasket also prevents internal materials from leaking out of the appliance.The cylinder head gasket might have to be replaced if the seal is broken and external materials can pass through into the cylinder head. This could be a result of puncturing, tearing, scraping, or eroding to the component, in which case the component should be 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 cylinder head gasket is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Cub Cadet, Snapper, and Simplicity.

This OEM replacement part is a crankcase gasket for lawnmowers. The crankcase gasket is used to seal the two halves of the crankcase. If the crankcase gasket is no longer sealing properly, it might need to be replaced. Luckily, this is a relatively simple repair. Before beginning, make sure the engine has cooled. Once cooled, locate the old crankcase gasket. Tilt the mower on its side. Once tilted, remove the blade of the mower. After removed, clean any dirt that might be on the crankshaft. Drill a small hole into the old seal and be careful not to damage the crankshaft. Insert a screw into the drilled hole and use it to pry off the old crank gasket seal. Once removed, install the new crankcase gasket. Reinstall the blade, and tilt the mower back to its upright position.This genuine replacement part is sold individually and is compatible with MTD brand lawnmowers.

The oil drain plug plays an important role in lawn and garden machines, although most only realize how important it is when it is not working properly. The plug fits into the oil drain at the bottom of the motor. It is removed to allow the oil to be drained from the motor when changing the oil. The durable oil drain plug may need to be replaced if it is no longer working properly. There could be leaks that allow the oil to escape from the motor, which would indicate it needs to be replaced. If the plug is lost, it will need to be replaced, as well. The genuine OEM replacement oil drain plug is sold individually. It is used for lawn mowers, snowblowers, tillers, leaf blowers, pressure washers, chainsaws, edgers, log splitters, wood chippers, heat pumps, generators, and other small engines. Compatible brands include Briggs & Stratton, Craftsman, Kenmore, Toro, Cub Cadet, Homelite, Murray, Lawn-Boy, Snapper, and Simplicity.

This replacement part is an oil seal and is intended for use in different types of lawn equipment. This part is a genuine replacement part made by Midwest Engine. Oil seals are typically found in machines with small engines and help ensure that the oil stays within the designated area. The seal is responsible for making sure there are no leaks during or after use. A new oil seal might be needed if the current one is missing or damaged. This can include being cracked or chipped. Any damage may cause oil to leak which can lead to additional problems within the machine itself. Be sure to wear work gloves during this repair as oil is difficult to remove from hands. Refer to the appropriate owner's manual before replacing this part. This oil seal is a genuine OEM replacement part. This part is sold individually and is sourced directly from the manufacturer to ensure proper fit and long-lasting use.

This is a genuine replacement oil fill cap that is found on many lawn and garden engines. The oil fill cap is responsible for securing the oil dipstick and fill tube. This small plastic plug screws into the oil fill tube with plastic threads and secures the oil, keeping it from leaking and providing the appropriate engine pressure. Over time, this small plastic piece can become worn, corroded, damaged, or even lost, which will require a full replacement. Without an oil fill cap, the pressure cannot be maintained in the engine and the oil could spill out of the machine. This genuine OEM oil fill cap is manufactured by Briggs & Stratton to exact standards. It is compatible with engines and equipment from this brand, as well as those from Toro, Snapper, and Vanguard. The oil fill cap is sold as an individual part and does not include the dipstick or any other parts and accessories. It is a good idea to inspect caps and other elements when performing maintenance to ensure proper operation. When replacing the filler cap, no tools are required, but the engine should be cool before doing any kind of work.

This is a flywheel key that is used in many types of lawn and garden equipment. It is fits into a slot located on the crankshaft. It also aligns with the keyway found on the flywheel. This flywheel key is tasked with ensuring the flywheel makes rotations in time with the crankshaft. The key can become damaged or lose and will need to be replaced to ensure the lawn equipment can continue to be used.Inspecting the flywheel key involves removing the gas tank and cowl from the equipment. From there, a user can determine whether the part is damaged or broken. If it needs to be replaced, the part can be removed from the flywheel, and a new flywheel key can be installed. The process takes little time and requires only a nut driver and a wrench set. Make sure to reassemble all parts before using the tool.This flywheel key is an authentic OEM replacement component sourced directly from the manufacturer. It is sold as a single part. The key can be used with wood chippers, leaf blowers, tillers, and lawnmowers manufactured by Simplicity, Briggs & Stratton, Cub Cadet, and Snapper.

This screw is a genuine Midwest Engine replacement part for small engine appliances, including lawn tractors, lawn mowers, snowblowers, leaf blowers, vacuums, and tillers. The purpose of a screw is to tightly link materials together through rotation that pierces into the material. A screw might have to be replaced in the event that it is lost or misplaced, a common occurrence due to its size. A screw might also be replaced if it deteriorates over time, through erosion, cracking, or piercing, thereby reducing its efficacy in holding materials together. This kind of damage can be attributed to general overuse, to age, or simply to long-term exposure. If a screw is subject to any of this kind of damage, it is best to replace it immediately, as the materials held together by the screw must continue to be held together. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This screw is compatible with the following brands: Briggs & Stratton, Toro, Cub Cadet, and Lawn Boy.

This part is a replacement camshaft. This is a genuine OEM part made by Midwest Engine and has been sourced directly from the manufacturer. It is intended to replace a defective or broken camshaft in various models of outdoor power equipment.The camshaft is important as it closes and opens the equipment's exhaust and intake valves. This part is a critical engine component and thus should be replaced if faulty in any way. Make sure to drain the fuel tank and disconnect the spark plugs before attempting to install this part. Wear work gloves to protect the hands and check that equipment is powered off and cooled down before starting the repair process. For more accurate information on how and where to use this camshaft, the appropriate owner's manual and equipment diagrams should be referred to. This camshaft is a genuine OEM part made of durable materials and is sold individually. It is suitable for use with outdoor power equipment models that have been manufactured by Midwest Engine, MTD, Craftsman, and other brands.

This is a genuine intake gasket replacement that is designed for use in certain lawn mower engines. This specialty intake gasket is what is responsible for creating the seal between the carburetor and the breather tube so that no gases or fluids leak when they pass between the two. This gasket is subjected to constant high pressure, vibrations, and extreme temperatures, and over time it will need replaced. Gaskets are generally considered a part of routine maintenance on most engines, and many owners will choose to keep a few extra on hand in case of an urgent repair need. This genuine OEM intake gasket is manufactured by Briggs & Stratton and designed to offer an identical replacement for the original gasket that came on the new unit. It is compatible with lawn mower engines in models from Briggs & Stratton and Toro, and will fit on over 150 different engine models in lawn mowers from these brands. The intake gasket is made of durable composite material. It is also a good idea to replace gaskets when servicing the carburetor to ensure a proper seal after reassembly. Be sure to use the right tools to install this part so that it isn't damaged in the process.

An air cleaner gasket is a valuable barrier between the carburetor of a machine and the air filter. This air cleaner gasket is made out of durable composite material. It is designed for use with outdoor lawn and garden power equipment such as lawn mowers, snowblowers, tillers, leaf blowers, and wood chippers. It is compatible with products by brands such as Briggs & Stratton, Toro, Cub Cadet, Snapper, and Simplicity.The air cleaner gasket part is crucial to the health and longevity of the machine's engine. The purpose of the air cleaner gasket is to help seal and protect the engine, the air cleaner, and other internal systems from dirt, contaminants, and debris that can often become the source of engine problems.The proper gasket for each user's engine depends entirely on the engine's design. That's why it is strongly recommended that users check their engine's Illustrated Parts List and refer back to their owner's manuals before making any decisions. This air cleaner gasket is an original OEM part sourced directly from the manufacturer, Midwest Engines. It is sold individually.

This is a replacement dipstick tube seal that is designed specifically for use with select Briggs & Stratton engines on lawn and garden equipment. This seal is designed to provide a seal in the oil dipstick tube to ensure that oil stays in the crankcase and air stays out. It sits in the bottom of the fill tube and also helps hold the tube securely in place. Over time, the seal can become damaged or broken and result in oil leaks. If this happens, the seal should be replaced immediately to ensure proper engine operation. Oil leaks can lead to poor performance or even cause further damage to the engine if left unrepaired. This replacement tube seal can get equipment back in proper working order in no time. This dipstick tube seal is manufactured to specific standards by Briggs & Stratton. It is designed for use with multiple models of engines that are installed on blowers, generators, tractors, and snow blowers from Briggs & Stratton, Murray, and Toro. There are over 150 compatible units that can use this exact part. This durable seal is made of premium composite rubber materials and is sold individually. Be sure to drain the oil before replacing this part to avoid spills.

This genuine replacement retainer E-clip is intended for use with lawn mowers, snowblowers, pressure washers, and more. It gets its name from the shape of the letter “E”, and has one side open, allowing it to have a larger retaining area and higher thrust capacity. Depending on the piece of equipment they are installed in, these retaining clips hold bearings, gears, pulleys, and other moving parts which have grooves in them. They are made of heat-treated steel which allows it hold strong through many uses, but it may eventually begin to wear out or break with extended use.This retainer ring E-clip is compatible with several equipment brands which use Briggs and Stratton engines This is a genuine OEM replacement part and is sold individually.

This O-ring seal is used in all sorts of lawn and garden equipment as a seal for the oil dipstick. It helps seal the system from debris and dirt that could otherwise reach the oil and end up in the motor. Over time, an O-ring will start to shrink, which can result in air and oil leaks and a poorly performing engine. If the O-ring has pits, blisters, or pocks on the surface, it will also need to be replaced.If an O-ring seal is worn, damaged, or clogged, it should be cleaned or replaced before the equipment that houses it is used again. A flat head screwdriver can be used to remove the damaged O-ring. Once the old one has been removed, a new one can be placed into the same position before using the tool.This O-ring seal is designed for lawnmowers, snowblowers, tillers, wood chippers, pressure washers, generators, and leaf blowers. It is compatible with equipment from Simplicity, Briggs & Stratton, MTD, Craftsman, Snapper, Toro, Lawn-Boy, and Cub Cadet. The seal is a genuine OEM replacement part directly sourced from the manufacturer. It comes with a single seal.

This replacement exhaust gasket is an authentic OEM part for a snowblower or lawn tractor engine. On these appliances, the exhaust is located quite near to the air filter, meaning that there is a chance that exhaust could leak into the carburetor. The carburetor requires fresh air to oxygenate fuel for combustion, so manufacturers install a gasket to help seal off the exhaust. Once installed, gaskets exist under a lot of pressure and will absorb the heat of the engine. These stresses cause gaskets to slowly degrade and eventually break their seal. If the exhaust gasket blows, the engine will not perform as it should. Be cautious of a noisy engine that burns more fuel than usual and gives off a burning smell. These are signs that the exhaust gasket has given out. If so, use a socket wrench and wrench set to disassemble the blower and air filter housings, then remove the exhaust manifold and change out the broken gasket. This high-quality replacement exhaust gasket is compatible with engines made by Toro, Husqvarna, Briggs & Stratton, and Snapper. It comes sourced from the original manufacturer and ships individually.

This exhaust gasket is a genuine Midwest Engine replacement part for appliances that use small engines, such as chipper shredders, snowblowers, leaf blowers, and lawn mowers. The function of an exhaust gasket is to seal off the carburetor from the exhaust tube in order to protect the engine from the accumulation of dirt, debris, and gunk within the inner workings. The exhaust gasket may require replacement over time from general wear and tear. If the exhaust gasket is not sealing, allowing dirt and debris to accumulate within the carburetor and leaving the exhaust tube exposed, the part should be replaced immediately. Evidence of a damaged exhaust gasket could also manifest in the form of oil leakage, black smoke arising out of the exhaust tube, and unusually low pressure from the combustion when using the appliance. Any of these symptoms can be attributable to multiple factors, so one should assess if the exhaust gasket is responsible before ordering a replacement.This exhaust gasket is compatible with the following brands: Briggs and Stratton, Cub Cadet, Toro, and Simplicity. This part sold individually.