As lawn and garden equipment goes, none seems to have as many names as the noble weed trimmer — aka weed wacker, weed eater, weed cutter, string trimmer, strimmer or, in some circles, brush trimmer ...

String trimmers get into spots your mower just can’t reach. These tools, sometimes called weed whackers, are also famously tough to start, particularly if they’ve been in storage all winter. Because ...