This is a genuine Husqvarna replacement part, it is sold individually.
The Fuel Filter is inside of the fuel tank.
Its purpose is to filter out dirt and other debris from contaminating the carburetor.

It will at sometime become clogged and restrict the fuel getting to the carburetor,and will have to be replaced.

We do have an article and video on How to Replace the Fuel Filters in Your Outdoor Power Equipment..

You can see this by going to the front page of our site and clicking on Repair Center.

Genuine OEM replacement part used with some Husqvarna Power Equipment. This item is sold individually. A spark plug is used to deliver electric current from an ignition system to an internal combustion engine. After time spark plugs will become dirty or fouled. It is a good idea to replace the spark plug once this happens. You should gap your spark plug according to the owners manual of the outdoor product you have.

Genuine Husqvarna replacement part, this part is sold individually.
The 503939601 Air Purge does just what the part name says.
It purges the air out of the carburetor.
Then it forces fuel from the fuel tank and fuel line in to the carburetor.

Genuine Husqvarna replacement part, this item is sold individually.
The purpose of the Fuel Tank Bushing is to create a seal and prevent leaks from the fuel tank. The fuel line are inserted in to the Bushing.
It is then pressed into the holes provided in the fuel tank.

This is a genuine manufacturer sourced replacement part designed for use with Husqvarna power tools. This knob helps to secure the air filter cover. Replacing this part does not require any tools, this knob is secured with a bolt (sold separately). This knob is made out of plastic and it is sold individually. You will need a wrench to replace this item.

Genuine Husqvarna replacement part, this item is sold individually.
This hose is connected to the air purge bulb.
The fuel from the is forced thru this tube and in to the carburetor>br> It can also be use as the return fuel line.