The installation of exhaust after-treatment systems in engines for such machinery would, however, increase their weight and operating temperatures to the extent that it would become dangerous for the operator and they would be impossible to carry by hand.
Dá suiteálfaí córais iarchóireála sceite in innill le haghaidh innealra den sórt sin, chuirfeadh sé le meáchan agus le teochtaí oibríochta an innealra a oiread sin go mbeadh sé contúirteach don oibreoir, áfach, agus nach bhféadfaí iad a iompar de láimh.