What exhaust emission standards and requirements must my engines meet?

(a) You must show that your engines meet the following requirements: (1) Outboard and personal watercraft engines must meet the exhaust emission standards specified in § 1045.103. (2) Sterndrive/inboard engines must meet the exhaust emission standards specified in § 1045.105. You may optionally meet these standards earlier than we require, as specified in § 1045.145(b). (3) Sterndrive/inboard engines must meet the engine-diagnostic requirements in § 1045.110. (4) All engines must meet the requirements in § 1045.115. (b) It is important that you read § 1045.145 to determine if there are other interim requirements or interim compliance provisions that apply for a limited time.