TOHATSU BFT115A Service Manual page 492

CYLINDER BLOCK
Select the correct bearing by referring to the crank pin
code letter and the connecting rod code number.
Connecting rod bearing selection table
Crank pin
code letter
A
B
C
D
Connecting rod bearing center thickness: 1.5 mm (0.06 in)
Mark
F
E
D
C
B
A
New connecting rod bearings are available in seven
sizes, identified by color, in increments of 0.003 mm
(0.0001 in).
Note that the bearings are selected so that the oil
clearance is in the range between 0.020 – 0.050 mm
(0.0008 – 0.0020 in).
Apply molybdenum disulfide oil to the entire surface of
the bearings.
Align the bearing lug (1) with the cutout in the
connecting rod or cap, and install with care not to
damage the sliding surface.
Be sure to measure the oil clearance after installing the
selected bearing(s) (page 15-42).
• Be sure to measure the connecting rod bearing oil
clearance after selecting the bearing by referring to
the selection table.
• If the two bearing I.D. colors are shown on the
selection table, use a bearing of the respective
colors.
15-44
Connecting rod code number
1 or I 2 or II 3 or III
Bearing I.D. color
Pink/ Yellow/
Pink
Yellow Green
Yellow/ Green/
Yellow
Green Brown
Green/ Brown/
Green
Brown Black
Brown/ Black/
Brown
Black Blue
Color Tolerance ranges
Pink -0.005 – -0.002 mm
(-0.00020 – -0.00008 in)
Yellow -0.002 – +0.001 mm
(-0.00008 – +0.00004 in)
Green +0.001 – +0.004 mm
(+0.00004 – +0.00016 in)
Brown +0.004 – +0.007 mm
(+0.00016 – +0.00028 in)
Black +0.007 – +0.010 mm
(+0.00028 – +0.00039 in)
Blue +0.010 – +0.013 mm
(+0.00039 – +0.00051 in)
4 or IIII
Green
Brown
Black
Blue
(1)
IDENTIFICATION COLOR