Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 124Get this manual
Cylinder Head Disassembly Cylinder Head Cover Removal
1Remove timing belt (See Removal" in this section)"Timing Belt
CAUTION
When removing the cylinder head from the cylinder block, do not scratch the gasket contact surfaces2Insert screwdriver at the pry points between the cylinder head and block to separatea b
2Remove the cylinder head cover and cover seal
a Cover Seal Cylinder Head Cover Washer (4) Bolts (4)