If you are facing difficulty in uprooting weeds from your backyard and you are using the best cutter then change the brush cutter attachment. You need to change the blade as it isn't suitable for removing weeds. You are working with a cutter that can cut grass and not stubborn plants. Weed is a unwanted but stubborn plant that can take root anywhere.
A home gardener like you should buy a tool that provides different cutting options. Look for a handheld grass cutter with a set of blades that you can change according to your needs. You need changing the blade according the properties of plants that you want to cut. Changing blade isn't a difficult task as you only need unscrewing some nuts and bolts, remove the existing blade and put a new cutter at the place of existing blade and then screw the cutter with nuts and bolts.
You need taking some precautions, when changing the blade. Make sure that you screw all the nuts and bolts; also ensure that the blade is properly fixed at its place. You can learn changing blades from users' manuals. Follow the process mentioned on the manual so that you make no mistake in replacing the existing blade with a new cutter.
If needed, you can buy an additional brush cutter attachment from market. If your tool doesn't have the blade you need, you should buy an addition cutter instead of changing the tool. Buying a new grass cutting tool will be more expensive than buying a blade. You can find an attachment on stores that sell gardening machinery.
You might need a new blade, if you miss one from your set of blades or a cutter becomes too blunt to be sharpened. In this situation, you will prefer completing your set of blades with a new piece instead of buying a new tool. You don't need investing a huge sum in buying a new brush cutter attachment as this part can be bought at affordable price from the shop of a manufacturer of gardening equipments.
Everyone, who uses a brush cutter, might need a new brush cutter attachment anytime. For this reason, this tool is always in high demand. Since it is popular, it is sold at high price but some manufacturers are selling this part at affordable price. They are able to maintain reasonable price because they sell their tools on their own.