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#Post#: 91593--------------------------------------------------
Emission numbers chainsaws
By: Chainsawrepair Date: August 22, 2025, 9:37 am
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Emission numbers of some saws I seen posted. =
Appears that the 564 XP uses clean air ports to “stratify” the
scavenging mixture, just like in “strato” chainsaws with
carburetors. According to data from the EPA, HC+NOₓ (or
CO) emissions are comparable to those of “strato” saws equipped
with carbs and better than those of the 500i.
HC+NOₓ[g/kWh]
564: 59.5
562: 62
7310: 55.6
572: 55.1
500i: 68.5
CO [g/kWh]
564: 252
562: 299
7310: 317
572: 225
500i: 406
CO₂ [g/kWh] EPA/spec sheet
564: 791/762
562: 763/778
7310: 749/743
572: 808/841
500i: 732/706
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