Caterpillar Technology—Marine Engine Emissions Upgrade Group Kit #7 (Tier 2 to Tier 3), Kit #8 (Tier 1 to Tier 3), Kit #9 (EUI to Tier 3) and Kit #10 (MUI to Tier 3)
Verified Technologies for SmartWay and Clean Diesel
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
On this page:
Technology specifications
| Engine Model/Application |
Caterpillar 3512 and 3516 (large cam bore) diesel engines for nonroad, marine applications, model year 1994 and newer, originally equipped with Tier 2, Tier 1, electronic unit injectors (EUI) or mechanical unit injectors (MUI) engines and rated at 1600 or 1800 rpm (varies by model) |
|---|---|
| Retrofit Fuel, Max Sulfur | 15 parts per million (ppm) |
| Reduction in particulate matter (PM) |
0.11g/kW-hr |
| Reduction in nitrogen oxide (NOx) |
5.8g/kW-hr |
| Reduction in hydrocarbons (HC) | n/a |
| Reduction in carbon monoxide (CO) |
5.0g/kW-hr |
Criteria to achieve emission reductions
The following criteria must be met in order for appropriately retrofitted engines to achieve the aforementioned emission reductions:
- The servicing dealer must follow specific installation instructions approved by Caterpillar and validate that the upgraded engine has the necessary components installed and has been tested to ensure the proper fuel delivery, power, torque and speed. The dealer must submit a validation form to Caterpillar in order to receive a label for the upgraded engine.
- The original Caterpillar 3500 Marine Engine includes mechanical unit injectors (MUI), electronic unit injectors (EUI), Tier 1 or Tier 2 engine. The electronic control module (ECM) must be replaced or updated as part of the upgrade. The primary critical new components are turbocharger, pistons, valve mechanism, injectors, electronic controls, and other installation parts as necessary.
- The engine must be operated on ultra-low sulfur diesel fuel (ULSD) of 15 ppm or less.
- This verification is for engines used in vessels with variable speed propulsion systems and is not applicable for engines used in recreational or constant speed propulsion applications.