Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 137Get this manual
Cylinder Head Gasket 1Install cylinder head gasket, dowel pins, and Oring sealb
3Torque in sequence and in two steps
b Cylinder Head Bolt Torque
aCylinder Head GasketDowel Pin (2)O-Ring Seal
Cylinder Head Installation
1Apply engine oil to the threads of each bolt and seat surface2Fasten cylinder head with eight bolts
Center Bolts Qty6 (Larger Diameter M8) 1st: 11 lbft(15 Nm) 2nd: 22 lbft(30 Nm) Outer Flange Bolts Qty2 (Smaller Diameter M6) 1st: 53 lbin(6 Nm) 2nd: 106 lbin(12 Nm) 4Install timing belt (refer to "Timing Belt Installation" in this section)