Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 126Get this manual
Exhaust Valve Removal EXHAUST VALVE COMPONENTS a
Intake Valve Removal
INTAKE VALVE COMPONENTS
a Exhaust Valve Spring Seat Valve Seal Valve Spring Spring Retainer Valve Lifter Intake Valve Spring Seat Valve Seal Valve Spring Spring Retainer Valve Keepers
REMOVING EXHAUST VALVES 1Anytime valve is removed, replace the valve seal2Remove exhaust valves as shown
REMOVING INTAKE VALVES 1Anytime valve is removed, replace the valve seal2Remove intake valves as showna a