2001 Mercury Mariner 50-60HP Factory Service Manual, Page 285Get this manual
LUBRICATION
Oil Pump Removal
IMPORTANT: Do not twistturn oil pump from side to side while removing it from cylinder head, as oil pump sealing o-rings will be cutPull oil pump away from cylinder head by inserting screwdriver in the pry points on oil pump body1Refer to section 4A for Cylinder Head Removal2Remove oil pump bolts, separate oil pump from cylinder head