[F&D Enterprises]

A weed wacker can be converted to a brush wacker by replacing the whip cord assembly with a used or new blade from a circular saw. A 7-1/4 inch (or smaller) blade with carbide teeth seems to work best.

The hole in the blade may be bigger that the shaft on your weed wacker, so you may have to insert a washer or thin bushing into the blade so that the blade fits snuggly on the weed wacker shaft. If you're lucky, it'll mount right on. Or, you may have to drill out the hole in the blade. But, in any case, the blade has to fit snuggly on the shaft. Make sure to snug up the nut on the shaft real good so that the blade doesn't fly off.

The blade has a lot more inertia than the whip cord, so once it's up to speed, it'll take a lot longer to slow down to idle. So, be very, very careful in using this adaptation! Also, you don't have to run the thing wide open to cut most any vegitation.

I've used mine to cut down trees as big as 4" caliper. Just be careful and take your time, and it will do an awesome job.