Hi Richard
Thanks for contacting the Answer Army to post another questions.
Units with s/n 1997 and after will be EPA, Your unit is a 2005, so use the EPA part number. The reason for there being two machine in the same year and one is without an EPA tag is due to these parts listing are used world wide and not every country has the EPA standards that we do.
I hope this clears up any confusion you may have.
Thanks again for contacting Husqvarna.
Hi Richard
Thanks for contacting the Answer Army to post another questions.
Units with s/n 1997 and after will be EPA, Your unit is a 2005, so use the EPA part number. The reason for there being two machine in the same year and one is without an EPA tag is due to these parts listing are used world wide and not every country has the EPA standards that we do.
I hope this clears up any confusion you may have.
Thanks again for contacting Husqvarna.