Emissions profile from new and in-use handheld, 2-stroke engines

Published by Atmospheric Environment

This study assessed emissions from 23 handheld 2-stroke engines from 1981-2003, revealing significant CO and HC reductions in phase-2 engines due to better design and catalytic controls. Using 10% ethanol fuel further cut HC and CO emissions. However, more oil in the fuel increased PM2.5 emissions. These findings confirm air quality improvements from updated emission standards. Read the study here.