The top gas weed trimmers, as of 2015, are the Husqvarna 223L and the Hitachi CG22EASSLP, according to ConsumerSearch.com. Both trimmers are available for under $300 and are highly rated by experts and consumers.
The Husqvarna 223L has an 18-inch cutting head and features two nylon lines that make edging and trimming a breeze. There is a 25cc engine on this gas weed trimmer, and it can easily cut through thick weeds and grass. Though this is a tough weed trimmer, reviewers claim this tool is very easy to handle and does not cause fatigue thanks to a balanced trim head and engine, along with an adjustable-loop handle. This weed trimmer costs around $250 and comes with a two-year warranty.
The Hitachi CG22EASSLP proves that a consumer doesn't have to spend hundreds to get a high-performance gas weed trimmer. This unit, available from Amazon.com for about $150, has a 21cc engine that meets California Air Resource Board emission guidelines and a 14-inch cutting head. One of the things that allows this weed trimmer to shine is the seven-year consumer warranty that comes with it. On Amazon.com, this weed trimmer is rated 4.1 stars out of five stars, and those who own this tool report very few issues.