Parts for Craftsman 143996502: Carburetor 640174 Parts

This is a genuine throttle return spring used on select small engines. The throttle return spring is part of the throttle system. It is attached to the throttle cable and the throttle body or carburetor, and is responsible for pushing the throttle closed when the gas is released and opening the throttle when the throttle trigger is engaged. If the spring is faulty, the throttle will not be able to open and close properly. This can affect the machine's ability to operate and even prevent it from operating at all if the throttle remains closed and no power can get through. A replacement should be done as soon as possible to prevent further damage to the engine. This genuine OEM throttle return spring is manufactured by Tecumseh, and compatible with machines from Toro, Husqvarna, MTD, Lawn Boy, and Tecumseh. There are over 150 models that can use this replacement part. It is made of durable metal and sold as an individual part. This throttle return spring is a simple replacement that should only take a few minutes. Be sure to use care when replacing the spring because it can be susceptible to damage under excessive pressure or strain.

A fuel inlet is a connector that allows gasoline from the fuel line of an engine to pass through it into the carburetor. Once in the carburetor, the fuel mixes with air and passes into the cylinder, where it ignites to create power for the engine. Thus, the fuel inlet is attached on the one side the carburetor and to the fuel pipe, or line, on the other. This inlet is used in power tools such as lawn mowers, snowblowers, edgers, pressure washers, chippers, and generators. Periodically, since it is made partially of plastic, the fuel inlet will weather and crack so that it is no longer fuel tight. The main sign to watch out for with fuel inlets is gasoline leakage. This is always a dangerous situation. The user may have to remove the carburetor housing cover to determine whether the leak comes from the fuel line or the inlet valve. It is a good idea to replace each of these pieces at the same time. When choosing a replacement part for the fuel inlet, always use a genuine OEM replacement part like this one. This inlet is compatible with power tools made by Tecumseh, Briggs & Stratton, Toro, MTD, Lawn-Boy, and Cub Cadet.

This genuine OEM replacement idle restrictor screw regulates how far the throttle cable can travel in lawn mower or snowblower engine. The throttle cable regulates the engine's speed, fuel consumption, and blade or auger turning speed. If the throttle cable travels out too far, the engine will begin guzzling fuel, causing it to run inefficiently. Therefore, manufacturers install this screw to help regulate the throttle cable. The best time to replace an idle restrictor screw is when making repairs to the throttle. These parts are installed together by the manufacturer so they experience similar aging and wear and tear. These screws can become stripped or corrode into their holes. Should this happen, a mechanic will have to pull the screw out and re-drill the hole. For home repairs, use a socket wrench set and a pair of pliers to access the old idle restrictor screw. This screw is a high-quality replacement part for Toro, Husqvarna, and Tecumseh engines. It was sourced from the original manufacturer and ships without any additional hardware.

The float shaft and pin are a genuine replacement for select Tecumseh carburetors on small lawn and garden equipment engines. The float shaft and pin are responsible for maintaining the fuel level within the carburetor. Over time because of repetitive motion, the float pin and shaft can break or become damaged, which will stop the carburetor from functioning properly. If the carburetor cannot function, the engine will not be able to perform. If left unattended, the engine and carburetor could fail completely or bigger issues could occur. Replacing the float is essential to getting the equipment back in order. This genuine float shaft and pin is designed for use on machines from Tecumseh, Poulan, Husqvarna, Lawn Boy, Cub Cadet, MTD, and Craftsman, and is compatible with a number of models. The fuel system should be drained and the engine should be cool before any engine repairs are started. Always wear gloves for hand protection. This float shaft and pin are made of durable materials and sold as a unit. No additional hardware or parts are included.

A primer bulb works to lubricate the engine with oil by pressing in the rounded tip of the primer bulb. It measures an inch in diameter and an inch tall. Over time these parts can wear out from sun exposure, contact with chemicals, or dry rot. The gasket may wear out before the primer bulb, so it is important to check this part regularly to discover any damage. Installing the new primer bulb kit should be easy and only take a few minutes. Only a screwdriver set and pliers are needed to complete this repair. This primer bulb kit works in conjunction with small engines, lawnmowers, log splitters, and pressure washers made by brands Briggs & Stratton, Craftsman, Cub Cadet, Lawn-Boy, MTD, Tecumseh, and Toro. It is a genuine OEM part and is sold individually.

This part is a replacement carburetor vent tube. This is a genuine OEM part made by Tecumseh and has been sourced directly from the manufacturer. The intended use for this part is to properly replace a broken or otherwise defective carburetor vent tube on different models of small engine outdoor power equipment. The carburetor vent tube forces fuel to move through the carburetor by acting as a vent or port that generates pressure. This part is essential to equipment functionality and will require replacement if broken or faulty. Special tools may be necessary to install this part properly. Always ensure that the equipment is completely powered off and is cooled down before attempting to start the repair process. For more accurate information on installation of this carburetor vent tube, reference the owner's manual or equipment diagrams for specific instructions and part location.This is an authentic OEM part and as such is sold individually and made from durable and high-quality materials. This carburetor vent tube can be used with a variety of lawnmower and wood chipper models manufactured by Tecumseh and Toro.

This carburetor nzle fits lawnmowers, lawn tractors, tillers, and other lawn and garden equipment. It is the part of the carburetor assembly that guides the fuel inside of the carburetor and maintains the proper fuel to air ratio. This is an essential part of engine performance. If the carburetor nzle is clogged, damaged, or broken, the engine will not run properly. The carburetor nzle can be replaced as a single repair or as part of an overall carburetor rebuild. Remove the carburetor float and float ring to get to the bowl. Remove the carburetor nzle from inside the carburetor throat with long nose pliers or by pressing it out manually. Ensure both o-rings come out with the nzle; if not, fish them out of the carburetor bowl. Install the o-rings on the new carburetor nzle before installation. This repair should be done in an area with adequate ventilation. Be sure to drain the fuel tank before removing the carburetor and take the spark plug off the engine.This carburetor nzle is sold as an individual unit. It is designed for lawn and garden equipment engines manufactured by Craftsman, Tecumseh, Cub Cadet, Lawn-Boy, and Toro.

The O-rings for the Main Nozzle Tube are essential to sealing the engine effectively. O-rings are used in many different parts of lawn equipment and can provide many benefits. Mainly, they provide a secure seal between various compartments to prevent leakage of fluids or air that could affect operation. Keeping O-rings and seals in good condition will help extend the life of lawn equipment. Over time and with regular use and exposure to the elements, these rings can become corroded, damaged, or otherwise ineffective or faulty. Always replace O-rings as soon as they fail so that there is no further damage to the engines or equipment. It is advised to purchase multiple O-rings to have backups on hand for emergencies, as well. Wear gloves whenever replacing O-rings on power equipment for safety and a secure grip. This specific OEM part is designed to replace faulty O-rings in engines, snowblowers, lawnmowers, and pressure washers from leading brands. It is compatible with models from Tecumseh, Toro, Briggs & Stratton, Cub Cadet, Husqvarna, and MTD. Be sure to check your user manual or equipment for part numbers and compatibility to guarantee an exact fit.

This is an authentic replacement bowl drain washer for use with lawn mower engines and other types of lawn and garden equipment. The washer is used to help seal the connection between the float bowl and the bowl drain screw in the engine. Although the washer is made from metal, it may still need to be replaced at some point if it becomes corroded, bent, or otherwise damaged. This would mean that it no longer provides a proper seal and that there could be leaks. Owners should periodically take the time to inspect the bowl drain washer, along with other elements of their machine, and replace them as needed. It may be a good idea to have several of the washers on hand. The genuine OEM replacement bowl drain washer is sold individually. It will work with a range of different types of machines including lawn mowers, snowblowers, pressure washers, and other small engines. Compatible brands include Craftsman, Toro, Tecumseh, Lawn-Boy, MTD, and Briggs & Stratton. Buyers should always be sure they are choosing the correct washers for their needs.

Here is a replacement welch plug for use with the carburetor on small engines and various pieces of outdoor lawn equipment. It is important for a carburetor to have a tight seal, which will prevent an influx of air and cause issues with the fuel mixture. The welch plug is meant to prevent these issues. Over time, the plug could have lost its seal, it could have become corroded, or cracked, or it could have become lost. This could cause a loss of power or for the engine to run rough. Owners must replace the welch plug as soon as possible to avoid issues with their engine. This welch plug is a genuine OEM replacement part that is sold separately. The plug can be used on many different types of small engines and lawn equipment, such as lawn mowers, snowblowers, lawn tractors, and chippers. Compatible brands include Craftsman, Toro, MTD, Lawn-Boy, Cub Cadet, and Tecumseh.

Carburetors must have tight seals to prevent too much air from getting into the carburetor at one time. If there are issues with a welch plug, it could cause an engine to lose power or to run rough. The plug might have lost its seal, it could have cracked, or it could have become lost. Sometimes, the vibration of the engine is enough to cause a plug to fall out if it is not tightly sealed. A loose fit will cause problems with the flow of fuel. This genuine OEM welch plug is sold individually and can help to seal your carburetor so your engine retains power. The part can be used with a range of lawn tractors, lawnmowers, snowblowers, and small engines. Compatible brands include Tecumseh, Lawn-Boy, Toro, Craftsman, and MTD.