Emissions regulations have eliminated noisy and polluting two-stroke engines from most applications, but these engines still dominate in lawn equipment like string trimmers and leaf blowers. Lehr, a startup based in Los Angeles, has developed an alternative--engines that run on 16-ounce propane canisters used for camp stoves.

Cleaner weed eaters

September 21, 2009

Emissions regulations have eliminated noisy and polluting two-stroke engines from most applications, but these engines still dominate in lawn equipment like string trimmers (aka weed eaters, weed whackers, line trimmers, weed whips) and leaf blowers. Lehr, a startup based in Los Angeles, has developed a cleaner and quieter alternative–small engines that run on 16 ounce propane canisters used for camp stoves.