1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter C - AIR PROGRAMS
  5. Part 91 - CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES
  6. Subpart B - Emission Standards and Certification Provisions
  7. 40 CFR § 91.109
40 CFR § 91.109
Requirement of certification—closed crankcase
June 9, 2020
CFR

(a) An engine's crankcase must be closed.

(b) For purposes of this section, crankcase means the housing for the crankshaft and other related internal parts.

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§ 91.108 Certification
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§ 91.110 Requirement of certification—prohibited controls

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