Parts for Craftsman 41AD578C799: Engine Assembly Parts

Fastener screw for tillers and lawn equipment. Secures components together for stable operation. Replace if stripped, missing, or damaged during maintenance.

This replacement part is a cylinder assembly. This is a genuine replacement part made by MTD. This part is commonly found working with engines and ensures that everything runs smoothly during use. A new cylinder assembly might be needed if the current one is damaged in any way. If the engine is struggling to power on, it could likely be an issue with the cylinder assembly. This part might need to be replaced after years of normal use. Be sure the engine is powered off before repairing this part. Work gloves are also recommended when working near or around the engine. This part is sold individually and is sourced directly from the manufacturer. This is a genuine OEM replacement part.

This part is a replacement piston ring kit. This is a genuine OEM part made by MTD and has been sourced directly from the manufacturer. This part can be used to replace broken or defective piston rings in a variety of line trimmer models. The piston rings are important as they seal the gap in between the cylinders and pistons to prevent leaks. Piston rings are subject to wear and tear and thus should be replaced with regularity. When working on or near an engine, it's important to make sure the equipment is powered off and completely cooled down before starting any repairs. For more accurate information on how and where to install this piston ring kit, the appropriate owner's manual and equipment diagrams should be utilized.As an authentic replacement part, this piston ring kit is suitable for use on several different models of line trimmer manufactured by MTD, Craftsman, and other brands. This is a genuine part made of high-quality, durable materials and is sold individually.

Seals the engine cylinder to prevent air and fuel leaks. Replace if cracked, worn, or causing performance issues. Verify compatibility with your model.

This breather hose is a component that makes up part of the ventilation system for the crankcase with lawn and garden tools. It has a single way valve that prevents excess exhaust gases from transferring to the engine. A reed is included to help lubricate the piston as the hose moves oil to the crankcase. The tube is made with special fibers that filter and cool the air to prevent the engine from overheating.If oil is leaking from lawn and garden equipment, this can indicate that the breather hose needs to be cleaned or has been damaged. If it is dirty, it will often create blue smoke that leaves the exhaust pipe. If the smoke is dark, this is a sign that the breather hose may be damaged and need replacement. Inspect the hose to see if it looks dirty or damaged so a replacement can be made if needed.This breather hose is an OEM replacement component directly sourced from the manufacturer. It is a single individual hose. The breather tube can be used with lawnmowers, tillers, string trimmers, edgers, and leaf blowers by Yard-Man, Craftsman, Cub Cadet, Bolens, Ryobi, Troy-Bilt, Murray, MTD, and Yard Machines.

This replacement part is an oil plug ring. It is a genuine replacement part made by MTD. This specific part is typically found in machines and appliances that have an oil tank. This ring is used to make sure that the oil from the machine does not escape during use.A new oil plug ring might be needed if the current one is allowing oil to escape from the tank. If there are oil drips near the engine it is possible that the ring is damaged or broken. This part is small but important to the overall use of many machines. Be sure to reference the specific user manual for more information on how to replace this part. This part is sold individually. It is a genuine OEM replacement part and is sourced directly from the manufacturer to ensure a proper fit and long-lasting use.

This genuine MTD replacement part is a crankcase cover O-ring for use with trimmers, blowers, tillers, edgers, string trimmers, and cultivators. A properly functioning O-ring is essential for the safe and reliable use of the equipment. The crankcase houses the crankshaft, and the O-ring is used to ensure a seal on the case. A damaged or worn out O-ring may cause oil to leak, leading to unsafe operation. The O-ring may become worn out or damaged with extended use, necessitating replacement. Remember to check the O-ring periodically to spot any wear or damage. This part is an identical replacement for an O-ring that is missing, worn out, or damaged. Prior to working with this part, please refer to the original product manual for installation instructions. Additional tools may be required for installation of this part. For safety, always wear gloves and ensure unit is powered down prior to performing any installation or repair.This high quality OEM replacement part is sourced directly from the manufacturer, and it is sold individually. This part is compatible with a variety of Craftsman, Cub Cadet, Troy-Bilt, Yard Machines, MTD, and more trimmers, blowers, tillers, edgers, string trimmers, and cultivators.

Replace your gas line trimmer's crankcase assembly if the engine won't start, loses compression, or leaks oil. Moderate difficulty repair for most users.

Flywheel assembly for tillers and outdoor power equipment. Replaces cracked, damaged, or worn flywheels that affect engine timing and cooling fan operation.

This part is a replacement lead wire kit. This is a genuine OEM part made by MTD and has been sourced directly from the manufacturer. This part's intended use is to replace a broken or defective lead wire in line trimmers.Lead wires are critical for the line trimmer to work as they connect the electrical system required to power the equipment. Wires can become stripped, broken, stretched, or otherwise defective over time and thus will require replacement. It's important when working on or near to an engine to make sure the equipment is powered off and completely cooled down before starting any repairs. Take caution when working with electrical wiring. For more accurate information on how and where to install these lead wires, reference the appropriate owner's manual and specific equipment diagrams.This is an authentic OEM replacement part made of high-quality materials. These lead wires can be used with different models of line trimmers that have been manufactured by MTD, Craftsman, Troy-Bilt, and other brands. Part sold individually.

This is an ignition coil/module assembly for a string trimmer. Ignition coils are generally found on yard equipment that uses a motor, like lawnmowers and trimmers. It sends electric pulses to the spark plug so that the equipment can start.A faulty ignition coil can cause an array of problems. If the machine isn't starting it may need to be replaced. Sometimes, engine problems may be caused by other parts, so be sure to confirm that it is the ignition coil causing the trouble. An ignition tester can be used to tell if it needs to be replaced. The clutch and the engine will have to be removed to access the old ignition coil, once it has been accessed it can be aligned on the magnets of the engine and put back together for the machine to work again.This is an OEM replacement part sourced directly from the manufacturer and it is sold individually. It is for use with these brands: Yard-Man, MTD, Cub Cadet, and Troy-Bilt.

Engine won't start or runs rough? This spark plug provides reliable ignition for small engines in trimmers, blowers, and tillers. Easy DIY replacement.

This gasket is a genuine MTD part. It is an insulator gasket meant as a replacement part on tillers, string trimmers, leaf blowers, edgers, and cultivators. The insulator gasket seals the connection between the insulator and cylinder. This gasket is made of durable, heat-resistant plastic. To replace the insulator gasket, a pair of work gloves, wrench, and screwdrivers are necessary. This gasket is a genuine OEM part sourced directly from the manufacturer. It is sold individually. It is compatible with machines made by Craftsman, Cub Cadet, MTD Pro, Troy-Bilt, Yard Machines, and Yard-Man.

Replacement insulator for gas trimmers and handheld power equipment. Installs to provide heat protection and electrical isolation. Order now if cracked or missing.

Carburetor gaskets ensure that the space between the carburetor itself and the insulator is properly sealed. This prevents air from seeping into the engine. As time passes, gaskets begin to become worn and crack, which can lead to small air leaks. If the gasket deterioration becomes severe the leaks will worsen. An air leak on an engine can cause vibrations and misfires. Gaskets should be regularly replaced to prevent engine trouble. This carburetor gasket is a genuine OEM part that has been sourced directly from the manufacturer. This carburetor gasket is manufactured from a top-quality composite material. This replacement gasket fits a number of different models of Troy-Bilt and Craftsman lawn and garden equipment. Please note these gaskets are sold individually.

This is a genuine replacement O-ring, which is a standard part on a number of engines. This O-ring is specifically designed as a replacement for the one found in the carburetor on select lawn and garden engines. The O-ring is designed to create a seal in the carburetor to ensure optimal performance and prevent leaks. It is also designed to help create the right amount of pressure. Over time, O-rings can become corroded, worn, or damaged due to their exposure to pressure and high heat. If they become broken or damaged, they can result in poor engine performance or even total engine failure. This genuine OEM O-ring is manufactured by RYOBI and compatible with a number of tillers, trimmers, and blowers from this brand. It is also designed for use with select models from Bolens, Yard Man, MTD, and Troy-Bilt. There are more than 150 models that can use this specific O-ring. It is made of durable materials and sold as an individual unit. Keep in mind that because O-rings have multiple applications and engines may have more than one type, it is important to double-check the location and application of the part to ensure the right one is being used.

Air cleaner assembly for string trimmers prevents dirt and debris from entering the engine. Replace when clogged or damaged to maintain performance.

Foam air filter prevents debris from entering your engine. Replace if dirty, clogged, or causing black smoke and high fuel consumption. Verify fit.

Stores fuel for gas trimmers, edgers, and blowers. Replace if cracked, leaking, or damaged. Durable plastic construction installs in fuel system.

Replacement fuel cap for lawn tractors, trimmers, blowers, and tillers. Prevents fuel leaks and evaporation. Replace if cracked, broken, or missing.

This fuel tank support is a genuine MTD part, sold individually. A fuel tank support can be used as a replacement part for outdoor appliances including tillers, string trimmers, leaf blowers, and edgers. This genuine OEM part is made out of high quality, durable materials that are specifically designed to last and hold up to possible general wear and tear over long-term usage.The fuel tank support might be subject to various forms of damage that can reduce or negate the efficacy of its function. If this occurs, the fuel tank support should be removed and replaced by this genuine OEM replacement part in order to guarantee safe continued usage of the appliance over its typical lifespan.This is a genuine OEM replacement part sourced directly from the manufacturer. It is sold individually. This fuel tank support is compatible with the following outdoor appliance brands: MTD, Craftsman, Cub Cadet, Troy-Bilt, and Yard Machines.

Trimmer won't start or recoil pull cord is stuck? This starter housing assembly restores pull-start function. Moderate DIY repair in 30-45 minutes.

Replace a frayed or broken starter rope that prevents your engine from starting. This pull rope wraps around the starter pulley for manual ignition.

Replace a broken recoil spring when your gas trimmer, edger, or blower won't pull-start or the cord won't retract. Simple DIY repair in under 30 minutes.

This replacement part is a rope guide, and it is intended for use in different types of lawn equipment. This is a genuine replacement part made by MTD. This rope guide allows the user to pull start the engine. The rope is connected to the transmission inside the engine that allows it to be turned off and on when desired. A new rope guide might be needed if the current one is damaged or missing. If the user is unable to start the lawn mower, then the rope guide might not be connected and should be replaced. Be sure that the engine is completely powered off while attempting this repair as this part is close to the engine inside the appliance. This part is sold individually and is a genuine OEM part sourced directly from the manufacturer to ensure proper fit in all appliances. Reference the owner's manual for more specific guidance.

Hard to start your trimmer? This starter pulley assembly restores the recoil system when the cord won't retract or pulls unevenly. 30-minute repair.

Clutch won't engage or burning smell from your tiller? This clutch assembly connects engine power to the tines. Moderate DIY repair for tillers.

This is the clutch drum that houses the clutch that engages the power tools on more than 50 gasoline-powered lawn and landscape devices. The clutch sits inside this housing, which enables it to rotate. When the RPMs of the engine reach a certain point, the clutch expands and causes the drive shaft of the tool to engage. Among the different kinds of equipment that use this clutch housing are cultivators, edgers, and grass trimmers. The clutch, and therefore the clutch drum, receive a great deal of wear for several reasons: the vibration of the engine, the rapid up and down change of engine revolutions, and resistance met by the tools that are transferred back to the clutch and housing. Signs that the clutch is failing include a slow response to increased engine RPMs and an inability for the power tool to engage the drive shaft. In these cases, the clutch and housing should be replaced in order for the equipment to operate properly again. When choosing a clutch housing, it is important to select one that, like this one, is a genuine OEM certified part. This housing is compatible with Craftsman, Troy-Bilt, MTD, Bolens, Yard-Man, and Ryobi equipment.

This is a genuine replacement screw designed for use in select MTD engines on lawn and garden equipment. Specifically, this is an anti-rotation screw, which is used to stop the drive shaft housing from turning inside of the main housing assembly. This screw is a small part that is subject to constant vibrations, pressure, and high temperatures. It can sometimes become worn or damaged as a result or even break off entirely, which would mean that the inner housing would no longer be held in place accordingly. If this screw is damaged or lost, it needs to be replaced with a genuine OEM replacement as soon as possible. This MTD anti-rotation screw is manufactured with high-quality materials and designed for use in select trimmers from MTD, RYOBI, Yard-Man, Troy-Bilt, Murray, Cub Cadet, Yard Machines, and Bolens. This replacement will require a screwdriver. Simply remove the damaged screw, if it is not already missing, from the clutch cover assembly, and then install the new screw. It should only take a few minutes to perform the replacement. Be sure to wear gloves to protect the hands. This screw is sold individually and does not include any additional parts or hardware.