Mercury 25 EFI Service Manual page 241

Dealer Responsibility
When performing service on all 1998 and newer outboards that carry a certification, attention must be given to any adjustments
that are made that affect emission levels.
Adjustments must be kept within published factory specifications.
Replacement or repair of any emission related component must be executed in a manner that maintains emission levels within
the prescribed certification standards.
Dealers are not to modify the engine in any manner that would alter the horsepower or allow emission levels to exceed their
predetermined factory specifications.
Exceptions include manufacturer's prescribed changes, such as that for altitude adjustments.
Owner Responsibility
The owner/operator is required to have engine maintenance performed to maintain emission levels within prescribed
certification standards.
The owner/operator is not to modify the engine in any manner that would alter the horsepower or allow emission levels to
exceed their predetermined factory specifications.
Exceptions
• Carburetor jets may be changed for high altitude use in accordance with factory recommendations.
• Single engine exceptions may be allowed with permission from the EPA for racing and testing.
EPA Emission Regulations
All new 1998 and newer outboards manufactured by Mercury Marine for operation in the USA, are certified to the United States
Environmental Protection Agency as conforming to the requirements of the regulations for the control of air pollution from new
outboard motors. This certification is contingent on certain adjustments being set to factory standards. For this reason, the
factory procedure for servicing the product must be strictly followed and, whenever practicable, returned to the original intent of
the design.
The responsibilities listed above are general and in no way a complete listing of the rules and regulations pertaining to the EPA
laws on exhaust emissions for marine products. For more detailed information on this subject, you may contact the following
location:
EPA INTERNET WEB SITE: http://www.epa.gov/otaq/marinesi.htm
Manufacturer's Certificate Label
The certification label must be placed on each engine at the time of manufacture and must be replaced in the same location if
damaged or removed. Shown below is a typical certification label and is not representative of any one model. Label shown
below is not to scale.
a
EMISSION CONTROL INFORMATION
THIS ENGINE CONFORMS TO
k
JAN EMISSION REGULATIONS FOR SPARK IGNITION MARINE ENGINES.
AND IS CERTIFIED TO
j
FEB
EXHAUST EMISSION STANDARD IN CALIFORNIA
REFER TO OWNER'S MANUAL FOR REQUIRED MAINTENANCE
MAR
SPECIFICATIONS AND ADJUSTMENTS
i
APR
FAMILY:
IDLE SPEED (IN GEAR)
MAY
h VALVE CLEARANCE (COLD) mm INTAKE:
SPARK PLUG:
JUN
g
Service Replacement Certification Label
IMPORTANT: By federal law, it is required that all 1998 and newer Mercury Marine outboards have a visible and legible
emission certification label. If this label is missing or damaged, contact Mercury Marine Service for a replacement.
Removal
Remove all remaining pieces of the damaged or illegible label. Do not install new label over the old label. Use a suitable solvent
to remove any traces of the old label adhesive from the display location.
90-8M0105568 eng MARCH 2016
CALIFORNIA AND U.S. EPA
g/kW-hr HC+N0x ENGINE FAMILY
kW ml
U.S. EPA FEL: g/kw-hr
TIMING:
EXHAUST:
GAP: HP
MERCURY MARINE
b
a - Date of manufacture
b - Kilowatt hour (horsepower)
JUL
c
c - Piston displacement
AUG
d
d - Maximum emissions output for the engine
SEP
family
OCT
e
e - Timing specifications
NOV
f - Horsepower rating
DEC f
g - Emission label part number
23403
h - Recommended spark plug and gap
i - Valve clearance
j - Idle speed
k - Family number
© 2016 Mercury Marine
Emissions
Page 3D-3