Marine Propulsion Engines

1. Marine Propulsion Engines EPA Meeting 02/14/07

2. Marine Propulsion Engines • Three Primary Types - Inboard (Engine and Transmission inside boat) - Sterndrive (Engine inside boat, Transmission outside boat) - Outboard (Engine and Transmission outside boat, hung on stern)

3. Marine Propulsion Engines Inboard

4. Marine Propulsion Engines Sterndrive

5. Marine Propulsion Engines Outboard

6. Marine Propulsion Engines • Two Primary Fuels - Gasoline (Outboard, Inboard, Sterndrive) - Diesel (Inboard, Sterndrive)

7. Marine Propulsion Engines • USCG Requirements - No exposed surface of the engine may have a surface temperature greater than 200 degrees F • Requires Water Cooled Exhaust

8. Marine Propulsion Engines • Cooling Systems - Raw Water Cooled (water from lake/ocean is pumped through the engine, mixed with the exhaust, and discharges with the exhaust) - Closed Cooling (water from lake/ocean is pumped through a heat exchanger, mixed with the exhaust, and discharges with the exhaust)

9. Marine Propulsion Engines Cooling System

10. Marine Propulsion Engines • Exhaust Emissions - Exhaust Emissions are almost entirely gaseous emissions - Exhaust Emissions bubble out of the water quickly (less than 30 seconds) - EPA and CARB regulate marine engine exhaust emissions as an air pollution source

11. Marine Propulsion Engines Questions????