Is a 2-stroke or 4-stroke gas trimmer better?

Two-stroke engines are lighter, simpler, and generally easier to pull-start, which is why most commercial and pro-homeowner trimmers still use them. Four-stroke engines run on straight gas (no oil mixing), are quieter, and produce more low-end torque, but they weigh more and cost more to service. Casual homeowners who hate mixing fuel tend to prefer 4-stroke; reviewers who run their trimmer hard usually stick with 2-stroke.