nonroad engine
Defined in 1 dictionary — U.S. Code
United States Code
42 U.S.C. § 7550 — as used in this part (4 versions over time)
The term “nonroad engine” means an internal combustion engine (including the fuel system) that is not used in a motor vehicle or a vehicle used solely for competition, or that is not subject to standards promulgated under section 7411 of this title or section 7521 of this title.