Section 1048.5 - Which engines are excluded from this part's requirements?This part does not apply to the following nonroad engines:
(a) Engines that are certified to meet the requirements of 40 CFR part 1051, or are otherwise subject to 40 CFR part 1051 (for example, engines used in snowmobiles and all-terrain vehicles).(b) Propulsion marine engines. See 40 CFR parts 91 and 1045. This part applies with respect to auxiliary marine engines.(c) Engines that are certified to meet the requirements of 40 CFR parts 92 or 1033 (locomotive engines), or are otherwise subject to 40 CFR parts 92 or 1033. 70 FR 40465 , July 13, 2005, as amended at 73 FR 59232 , Oct. 8, 2008