Mercury 5 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.
57249
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 5 SERIES Specifications

General

Horsepower	5 hp
Cylinders	1
Starting	Manual
Full Throttle RPM Range	5000-6000
Fuel Induction System	Carburetor
Shaft Length	15"
Recommended Fuel	87 octane