1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 105Get this manual
Adjusting Valves NO.3 AND NO.4 INTAKE VALVES NO.2 AND NO.4 EXHAUST VALVES 1Turn the driven gear and align the "4" mark on the gear with the the cylinder head 2Adjust the valve clearance for NO.3 and No.4 intake valves and No2 and No.4 exhaust valves
Cylinder Head Cover Installation
1Reinstall the cylinder head coverTighten bolts to the specified torque
aRetainerMounting Bolts (7)
Cylinder Head Cover Bolt Torque
70 Ib in (8 Nm) 23Reinstall the fuel pumpTighten bolts to the specified torqueReconnect the breather hose and vent hoseUse sta-straps to fasten all hose connections