Cylinder Block Reassembly; Selecting New Main Bearings - Mercury 40 Service Manual

Cylinder Block Reassembly

Selecting New Main Bearings

1. Locate the main bearing code letters on the cylinder block.
2. Refer to the following reference chart to select the correct main bearings.
3. Use the color coded main bearings that match the main bearing code letter.
Main Bearing Code
a -
b -
90-828631R3 MARCH 1999
Letter
A
B
C
#1
#2
#3
#4
#5
Main Bearing Code Letters
Main Bearing Identification Color Location
Main Bearing Color Code
Blue
Black
Brown
a
A B C
#1
#2
#3
#4
b
#5
53819
CYLINDER BLOCK/CRANKCASE
Page 4B-27