Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 152Get this manual
Crankshaft PISTON CONNECTING ROD DISASSEMBLY 1Remove Circlips with needle nose pliers
MAIN BEARING DISASSEMBLY 1Do not interchange the main bearingsThey must be installed in their original position2Disassemble crankshaft as shown
NOTE: Each connecting rod and cap (b) are matched setThey must not be interchanged2Mark the top side of the connecting rods3Scribe the cylinder number (1 or 2) on inside of each piston and connecting rod (c) to insure reassembly of piston to same connecting rod and cylinder