This is far less of a concern with torquey gasoline-powered models. Heavy-duty replacement heads put a lot of stress on the weed eater’s motor and may shorten the weed eater’s lifespan. If you’re able to put a screw-on head on your electric or cordless trimmer, it’s important to choose a light-duty model. Many electric or battery-powered weed eaters use proprietary heads that snap onto the shaft, while weed eater heads for gasoline-powered models screw onto the shaft, in most cases. There isn’t always a difference between weed eater heads for electric and gas-powered models, but when there are, it’s usually a deal-breaker. If you’re using a powerful gasoline-powered model, you might consider trading up to a larger diameter string, as it’s less likely to break while trimming. Many universal heads can handle string thicknesses between 0.065 inch and 0.095 inch, and heavier-duty models might tolerate 0.105-inch string or thicker.

Many universal heads come with adapters that attach to nearly any weed eater.īeyond the size of the head itself, the size of the weed eater string is a consideration, too. Unless you purchase directly from the weed eater’s manufacturer, you’re going to need to find a universal head. Be sure to give this section a thorough look to choose the best head for your weed whacker.

This section explains each key consideration and provides a bit of background on what goes into replacing a weed eater head. Photo: What to Consider When Choosing the Best Weed Eater Headīefore setting out to purchase the best weed eater head, you’ll need to consider a few factors.

065 string for weed trimmers