Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 158Get this manual
CVLlNDER BLOCK AND CRANKCASE
12Lubricate piston, rings, connecting rod jou rnals and cylinder bore with engine oil13Use Piston Ring Compressor (FT 2997) to compress rings
14Position mark 3H6 towards oil pan15Position the direction arrowtowards the cam shaft16Install the piston assembly
Connecting Rod Bolt Torque