Parts for Tecumseh TYPE 643-20C: Carburetor Parts

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.

The spring clip is a standard part found on many small engines used on outdoor power equipment. This clip is used in the carburetor, where its job is to interact with the carburetor float. This helps engage the inlet needle to allow fuel to flow into the assembly. If this spring clip breaks or becomes detached, the float and inlet needle will not function accordingly. This will affect the fuel and air mixture going to the engine, which could cause performance issues. In severe cases, the engine may not operate at all. Replacing the spring clip is the best solution and should be done as soon as possible. This genuine OEM spring clip is manufactured to strict standards by Tecumseh. It can be used in a number of products from the brand, as well as those from Toro, Cub Cadet, MTD, Husqvarna, and Briggs & Stratton. Compatible machines include snow blowers, lawn mowers, generators, pressure washers, and tillers. There are more than 100 models that can use this replacement part. It is made of durable metal and sold as an individual unit. Be sure to work in a well-ventilated area and drain the fuel system whenever performing engine and carburetor repairs.

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.