Marine Propulsion Engines EPA Meeting 02/14/07

Marine Propulsion Engines Three Primary Types 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)

Marine Propulsion Engines Inboard

Marine Propulsion Engines Sterndrive

Marine Propulsion Engines Outboard

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

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

Marine Propulsion Engines Cooling Systems 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)

Marine Propulsion Engines Cooling System

Marine Propulsion Engines Exhaust Emissions 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

Marine Propulsion Engines Questions????