1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 156Get this manual
CYLINDER HEAD
IntakeExhaust Valves
REFREF NOQTY1 10 11 12 13 14 TORQUE DESCRIPTION INTAKE VALVE EXHAUST VALVE SEAT-Valve Spring VALVE SPRING RETAINER-Valve Spring KEY SEAL-Valve Stem ROCKER ARM ASSEMBLY SCREW NUT ROCKER SHAFT COLLAR SPRING SPRING lb-inlb-ft Nm