California Air Resources Board

Certified Tier 4 Marine Engines

The document linked below is compiled by CARB staff to provide commercial harbor craft owners/operators a resource of certified Tier 4 engines. CARB staff will make every effort to update this list regularly. It does not constitute an endorsement of the listed engines and is intended as a resource only.

Certified Tier 4 Marine and Marinized Non-Road Engines (Updated 9/4/2024)

CCDET IV Opacity Smoke Tester Vendor List

The document linked below is compiled by CARB staff to provide commercial harbor craft owners/operators a list of CCDET IV-certified CHC opacity testing vendors. CARB staff will make every effort to update this list regularly. It does not constitute an endorsement of the listed vendors and is intended as a resource only.

CCDET IV Opacity Smoke Tester Vendor List (Updated 5/16/2024)