Mercury 40 FourStroke - Cylinder Head Reassembly; Valve Installation

CYLINDER HEAD
90-857046R1 NOVEMBER 2001 Page 4A-37
Condition: Valve seat is too narrow and is located near the bottom edge of the valve face.
Valve Seat Cutter Set Desired Results
Use
60° Cutter, First
To center the seat and to in-
it Width
45° Cutter
crease its Width
Cylinder Head Reassembly
Valve Installation
INTAKE AND EXHAUST VALVE COMPONENTS
a
b
c
d
e
a-Valve
b-Valve Seal
c-Valve Spring
d-Spring Retainer
e-Valve Keepers