Mercury 4 SERIES User Manual

CYLINDER HEAD
Page 4A-2 90-857138R1 MAY 2000
CYLINDER
HEAD
IDENTIFICATION
4/5 = 5 (1999 & 2000)
5
6 = 6 (2000)
4/5/6 = 6 (2001)
“A”
“B”
“C”
“D”
Valve Dimensions
Head Diameter Face Width
Seat Width
Margin Thickness
VALVES
Valve/Valve Seat/Valve Guides:
Valve Clearance (cold)
Intake
Exhaust
Valve Dimensions:
“A” Head Diameter
Intake
Exhaust
“B” Face Width
Intake
Exhaust
“C” Seat Width
Intake
Exhaust
“D” Margin Thickness
Intake
Exhaust
Stem Outside Diameter
Intake
Exhaust
Guide Inside Diameter
Intake
Exhaust
Stem To Guide Clearance
Intake
Exhaust
Stem Run-out Limit (max.)
0.002 - 0.005 in. (0.06 - 0.14 mm)
0.004 - 0.007 in. (0.11 - 0.19 mm)
0.980 - 0.988 in. (24.9 - 25.1 mm)
0.941 - 0.949 in. (23.9 - 24.1 mm)
0.102 in. (2.6 mm)
0.102 in. (2.6 mm)
0.031 in. (0.8 mm)
0.031 in. (0.8 mm)
0.028 in. (0.7 mm)
0.047 in. (1.2 mm)
0.216 in. (5.48 mm)
0.214 in. (5.44 mm)
0.2165 in. (5.5 mm)
0.2165 in. (5.5 mm)
0.0008 - 0.0017 in. (0.020 - 0.044 mm)
0.0018 - 0.0028 in. (0.045 - 0.072 mm)
0.0006 in. (0.016 mm)

Mercury 4 SERIES Specifications

General

Starting	Manual
Cylinders	1
Fuel Type	Gasoline
Steering	Tiller
Recommended Fuel	87 Octane
Warranty	3 years
Horsepower	4 HP
Full Throttle RPM	5000 - 6000 RPM
Alternator Output	Not Available
Fuel System	Carburetor
Cooling System	Water Cooled
Shaft Length	15 in
Gear Shift	Forward, Neutral