1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 156Get this manual
Selecting New Connecting Rod Bearings 1Locate the connecting rod bearing code letter that is scribed on the side of the connecting rod 2Refer 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 letter
Installing Connecting Rod Bearings
IMPORTANT: Do not interchange used connecting rod bearingsReinstall bearings in their original position1Clean all the oil from the bearing surfaces on the connecting rod2Install connecting rod bearingsMake sure the locking lug on each bearing fits into its notch