2001 Mercury Mariner 50-60HP Factory Service Manual, Page 271Get this manual
CYLINDER BLOCKCRANKCASE
Selecting New Connecting Rod Bearings
1Locate the connecting rod bearing code letter that is scribed on the side of the connecting rod2Refer to the following reference chart to select the correct connecting rod bearings3Use the color coded connecting rod bearings that match the connecting rod bearing code letterConnecting Rod Bearing Code Letter Connecting Rod Bearing Color Code Blue Black Brown
aConnecting Rod Bearing Code LettersConnecting Rod Bearing Identification Color Location