EMISSIONS
Page 3C-8 90-857046R1 NOVEMBER 2001
1999 MODEL YEAR CERTIFICATION 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 certifica-
tion label and is not representative of any one model. Label shown below is not to scale;
(shown at twice the normal size).
EMISSION CONTROL
INFORMATION
THIS ENGINE CONFORMS TO 2001 CALIFORNIA AND U.S. EPA
EMISSION REGULATIONS FOR SPARK IGNITION MARINE ENGINES
IDLE SPEED (IN GEAR): 800 ± 25 RPM
TIMING (IN DEGREES): NOT ADJUSTABLE
Spark Plug: NGK DPR6EA-9
Gap: 0.9 mm (0.035″)
Intake: 0.15 – 0.25
REFER TO OWNERS MANUAL FOR REQUIRED MAINTENANCE.
FAMILY: WM9XM.747220
FEL: 32.20 g/kW-hr
30 HP
747 cc
JAN 1999
Cold Valve Clearance (mm)
Exhaust: 0.25 – 0.35
c
b
d
e
f
g
h
i
a
a-Family Example
b-FEL: Represents (Mercury Marine) statement of the maximum emissions output
for the engine family
c-Timing specifications when adjustable
d-Recommended spark plug for best engine performance
e-Valve Clearance (Four Stroke engines only)
f-Date of Manufacture
g-Cubic Centimeter
h-Engine Horsepower rating
i-Idle Speed (In Gear)
W M9X M. 747 2 2 0
Model Year
W=1998
X=1999
Manufacturer
Mercury Marine
Regulation
M=Marine
Displacement
Liter
Cubic Inch
Application
1=PWC
2=OB
Technology type
1=Existing
2=New
Unspecified
Decal Location for 1999 Models:
Model Production Part No. Service Part No. Location on Engine
1999 Merc/Mar 747 cc 37-856984 22 37-856985A22 Flywheel/Rewind Cover
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