Parts for Craftsman 41AS99MS799: Engine Assembly Parts

This is a replacement spark plug that is designed specifically to be used with select string trimmers. the spark plug is connected to the ignition module and is responsible for creating the spark that starts the internal combustion engine. Over time, the electrode on the spark plug will wear down. Other issues can also arise that cause the spark plug to foul or stop working. Spark plugs are part of routine maintenance on any engine, but most owners keep a spare or two around just in case of emergencies. In the event that the spark plug is bad, the engine will not start. This genuine OEM spark plug is manufactured by MTD and designed for use in select trimmers. It is compatible with over 50 models of string trimmers from MTD, Bolens, Murray, Troy-Bilt, Yard Man, and Cut Cadet. Owners will need to consult their product diagram or manual to find the exact gap for the spark plug when replacing them. Many models claim to come pre-gapped, but they can settle during shipping and should always be re-gapped prior to installation. This is sold as an individual unit. Be sure to wear gloves for hand protection when replacing spark plugs and performing other maintenance.

This is an insulator assembly includes the insulator, seals, and hardware. It is designed to create the right spacing between the cylinder and carburetor on many blowers and trimmers made by various manufacturers. The insulator assembly also keeps heat from moving between the other components. Over time, the insulator assembly can become damaged or crack. When this occurs, air can reach the engine and create a condition where the engine can't perform at its best. If this happens, the insulator assembly will need to be replaced. Take off the air filter, drain the fuel, and remove the intake assembly. The insulator can be taken off of the engine before the replacement is added. Use mounting screws to fit the insulator to the other components. Reassemble the other parts to use the tool.This insulator assembly is a genuine OEM replacement part sourced directly from the manufacturer. It is sold as an individual part. This component is made to be used in leaf blowers, tillers, and string trimmers manufactured by Craftsman, Cub Cadet, Troy-Bilt, Murray, Yard Machines, MTD, Bolens, and Yard-Man.

These O rings are replacement parts intended for use in a number of gasoline-powered lawn trimmers. The O rings serve as gaskets and are placed at the entry and exit points in the carburetors where gasoline and air are mixed and the expansion powers the trimmer. Though constructed of durable material, periodically the flow of the air/fuel mix or the rush of expanding air will cause damage to occur to the O rings so they become less resilient and the carburetor functions less efficiently. In these cases, users often decide to replace not just the element of the carburetor but the O rings as well. Users may notice problems with the carburetor when they cannot get an adequate adjustment, allowing the trimmer to function smoothly. They may also have trouble getting the trimmers to start at all or run without smoking. To replace the O rings, remove the air filter cover and carburetor. Once the carburetor has been cleaned, and the gasket and filter replaced, add a fresh mix of 40:1 fuel. The trimmer should start immediately. These OEM certified O rings are compatible with Bolens, Troy-Bilt, Yard Machines, and Craftsmen trimmers.

This carburetor is a device for supplying a two-cycle engine with a mixture of air and fuel. This part comes pre-assembled and has a plastic choke lever along with a metal body. The primary purpose of a carburetor is to mix the right amount of fuel with air so that the engine runs properly. If enough fuel is not mixed with the air, the engine runs lean and can either stop running or gets damaged. On the other hand, if too much fuel is mixed with air, the engine runs rich, and it either floods, runs poorly, runs very smoky, or wastes fuel. The carburetor is in charge of getting the right mixture. If the carburetor is clogged, the engine will not get enough fuel. It may not start or may run rough. The procedure to replace the carburetor is quick and easy, taking only around 15 minutes, but it is recommended to work in a ventilated area. This carburetor works with outdoor power tools like the trimmer, leaf blower, and tiller. It is compatible with specific products from popular brands like Craftsman, MTD, Murray, and Troy-Bilt. It is sold individually and is supplied directly from the original equipment manufacturer.

A carburetor gasket is a thin rubber material that provides a seal between two parts. Its primary purpose is to prevent fuel and air leaks. This gasket is installed between the air cleaner and the carburetor. Over time, it can crack and tear due to heat and fuel exposure. When this happens, the carburetor may produce the wrong combustible mixture for the engine. In return, the engine may experience rough idling and flooding. A carburetor gasket replacement is necessary. MTD makes this carburetor gasket replacement. It is manufactured to fit string trimmer, leaf blower and tiller made by MTD, Bolens, Troy-Bilt, and Craftsman. This brand-new carburetor gasket is sold individually. A fully assembled carburetor and O-ring are sold separately.

This is a replacement air filter for a trimmer, leaf blower, or vacuum. It is necessary to prevent any significant quantities of dust or debris commonly kicked up during the use of the machine from entering into the engine. It could block the airflow, overheat the motor, and harm or destroy it. This OEM replacement part is straightforward to install and depending on the model, will usually require little more than a screwdriver to effect the repair. The removal of the housing over the filter is needed, and then it is a matter of just removing the clogged our outdated filter and slipping in the replacement. Shaped like a cup, it will fit snugly into the housing, and make reassembly just as simple. Before replacement, the filter should be treated with some oil by popping it into a plastic bag with a few drops of oil and working it into the material. This genuine OEM air filter works with Craftsman, Ryobi, Troy Bilt, Yard-Man, Bolens, MTD, Cub Cadet, and Murray machines, among others. It ships individually.