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Nonroad Engines, Equipment, and Vehicles

Lawn and Garden (Small Gasoline) Equipment

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EPA has adopted emission standards to control both exhaust and evaporative emissions from small spark-ignition engines. Phase 3 exhaust emissions standards take effect in 2011 or 2012, depending on the size of the engine. Evaporative emission standards address fuel permeation through fuel-system components in addition to fuel venting during engine operation.

Regulations and Guidance

See the Electronic Code of Federal Regulations (e-CFR) for the full text of current regulations that apply to Small SI engines and equipment:

40 CFR part 1054 Phase 3 Exhaust emission standards
40 CFR part 1060 Evaporative emission standards
40 CFR part 1065 Phase 3 Engine-testing regulations
40 CFR part 1068 Phase 3 General compliance provisions
40 CFR part 90 Phase 1 and Phase 2 Exhaust emission standards and compliance; test procedures available through 2012 model year

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