Mercury 40 Service Manual

CYLINDER HEAD
90-828631R3 MARCH 1999 Page 4A-35
Condition: Valve seat is too narrow and is located near the bottom edge of the valve face.
55802
Valve Seat Cutter Set Desired Results
Use
60° Cutter, First
To center the seat and to in-
crease its Width
45° Cutter
crease
it
s
Width
Cylinder Head Reassembly
Valve Installation
INTAKE AND EXHAUST VALVE COMPONENTS
a
b
c
d
e
f
a-Valve
b-Spring Seat
c-Valve Seal
d-Valve Spring
e-Spring Retainer
f-Valve Keepers

Mercury 40 Specifications

General

Horsepower	40 hp
Starting System	Electric
Steering	Remote
Fuel Induction System	EFI (Electronic Fuel Injection)
Shaft Length	20"
Full Throttle RPM Range	6000