GX640SD3 Honda Engine - Overview

This metal washer is compatible with several different makes and types of small engine equipment, and is a genuine OEM part. Used to evenly distribute pressure on the oil drain from the drain bolt, this washer has a 19mm/.75-inch outer-diameter and 12mm/.5-inch inner-diameter and is sold individually without the drain bolt, which is sold ...Read moreseparately. It is, however, recommended that if you replace this washer, you replace the drain bolt as well.

This is an authentic Honda replacement part, sourced from the original manufacturer for use with small engines. The special hex head bolt is commonly used to secure the ignition module assembly. This flanged bolt is available as an individual replacement part, please see illustrated part list for associative parts.

An authentic OEM supplied part that is specially designed for use with Honda engines commonly installed on lawn and garden equipment. This is one of the gaskets that helps to provide an air-tight seal for the air cleaner, for correct location and use make sure to check appropriate diagrams of your model. Over time gaskets and seals tend t...Read moreo wear out and may crack eventually requiring replacement to maintain peak performance. It is a high-quality component that is made of durable rubber and it is sold individually.

The noise suppressor cap assembly, also known as the spark plug cap/boot is responsible for connecting the spark plug to the ignition coil, and helping to reduce the amount of noise created when running outdoor power equipment. This OEM replacement part includes a rubber cap with a metal contact inside. It is found at the end of the spark...Read more plug wire and has a threaded center shaft which allows you to easily screw it into position. Over time the metal contact may corrode, or the cap may dry out and crack or break. If your equipment is misfiring, running poorly, or has interference with other electronic equipment, the cap assembly likely needs to be replaced. To remove the old cap assembly, use your fingers or a set of pliers to carefully pull it off the end of the wire. Place the new cap assembly onto the end of the wire and fasten it securely. Please note this part is sold individually.

The 6x8 flange bolt has a lot of applications on various equipment, but is generally designed to secure and lock parts in place. Common on lawn and garden equipment and engines, this flange bolt is silver in color, made of metal, and can become broken over time due to wear and tear. You will need a wrench or socket and torque wrench whe...Read moren making this repair, which is generally easy, but a lot depends on the location and nature of the part it attaches to.

The carburetor gasket fits between the carburetor insulator and the carburetor. This part is priced individually and keep in mind that two may be needed. It is made of a thin flexible material and can break easily and will need to be replaced. A screwdriver, socket set, and wrench set all may be needed during the replacement of this item....Read more It is a genuine OEM sourced part which is specially designed for use with Honda small engines.

This is an authentic replacement parts kit manufactured for use with Honda small engines. The gasket set is used to replace worn out gaskets in the carburetor. The kit includes the gaskets that seal the bowl and some of the valves. This kit is sold as an individual replacement part.

This is an authentic Honda replacement part that has been sourced from the original manufacturer to be used with small engines. The metal wingnut is used to fasten the bolt that secures the air cleaner housing. This item may not require tools to install and is priced as a single item.

It is a genuine item that is supplied by the original equipment manufacturer for use with Honda engines which are commonly installed on a variety of lawn and garden equipment. This is an identical replacement for a missing or a faulty inlet needle that was originally installed on a new unit. Please make sure to refer to the appropriate di...Read moreagrams of your model for the correct location and application of this hardware. Keep in mind this high-quality inlet needle valve is made of durable metal and is sold individually.

This is an 8mm hex nut, which is a six-sided piece of hardware that connects two parts together in your lawn equipment by keeping screws, bolts, or studs in place. Hex nuts are commonly used in areas of your machine that undergo high stress like in the blade assembly, engine or wheels. If a hex nut is broken, it may be cracked or corroded...Read more, and you may find that you cannot tighten it enough to hold parts in your machine together. If it is not replaced, the parts of your machine may come apart. To remove a hex nut, use a wrench to turn it counterclockwise. Before purchasing this OEM replacement part, keep in mind that this part is sold individually and consult your instruction guide to find out how many nuts your machine needs and where they are located. It is best to replace all the hex nuts at once because they wear out at the same time.