Transcript NMMA / CARB

Marine Propulsion Engines
EPA Meeting
02/14/07
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)
Marine Propulsion Engines
Inboard
Marine Propulsion Engines
Sterndrive
Marine Propulsion Engines
Outboard
Marine Propulsion Engines
• Two Primary Fuels
-
Gasoline (Outboard, Inboard,
Sterndrive)
Diesel (Inboard, Sterndrive)
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
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)
Marine Propulsion Engines
Cooling System
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
Marine Propulsion Engines
Questions????