This is a genuine OEM replacement part, it is sold individually.
This is the spring that recoils the starter rope on the models shown below.
Over time the spring will wear and loose its tension and sometimes break.
We do have an article and video on "How to Fix the Starter" that can be found on the front page of our site, by clicking on the "Repair Center"

This is a genuine OEM replacement part, it is sold individually.
The purpose of the 900994004 Carburetor Gasket is to prevent an air leak, which would cause the engine to run poorly.

It is advised to replace these gaskets when replacing or repairing the carburetor.

This is a genuine OEM replacement part, it is sold individually.
This is the fuel pick-up line it is connected to the line coming from the fuel tank by means of a inline fuel fitting.
It is then connected to the carburetor.
It is used on the model numbers shown below.

This is a genuine OEM replacement part, sold individually. This Bumper helps keep the fuel tank in place, and minimizes vibration of the fuel tank. This part is used with a variety of string trimmers, compatible with the models listed below.

Genuine OEM replacement part, this item is sold individually. Includes the fuel tank, fuel lines, fuel filter, & fuel tank cap. It is commonly used in outdoor lawn equipment, compatible with the models listed below. You will have to remove the crankcase cover to replace this part. It is important to clean the surrounding area before you open the crankcase cover so you don't get dirt in the engine. You may need to replace the crankcase cover gasket (98767A) as they often stick and tear when you remove the cover.

This is an OEM replacement part and is sold individually.
Its purpose is to filter out dust and debris from contaminating the carburetor.

When replacing the filter you can open the package in comes in and put a bit of two cycle oil in the bag and let it absorb into the filter. Then remove it from the bag and squeeze it with a paper towel to remove the excess oil.
This will aid the filter in filtering out the unwantables.