Mercury 4 SERIES User Manual

CYLINDER HEAD
Page 4A-14 90-857138R1 MAY 2000
Cylinder Head Resurfacing
1. Place 400-600 grit wet sandpaper on flat surface.
2. Resurface the head using a figure eight motion until within the specifications.
NOTE: Rotate the head several times during the resurfacing procedure to avoid removing
to much material from one side.
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VALVE GUIDE INSPECTION
1. Measure the valve guide bore (a). If valve guide wear is out of specification, replace the
cylinder head.
55794
a
Valve Standard Inside Diameter Out of Limit to Use
Intake 0.2165 in. (5.5 mm) 0.2181 in. (5.54 mm) or greater
Exhaust 0.2165 in. (5.5 mm) 0.2192 in. (5.57 mm) or greater

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