TOHATSU MFS 25D Service Manual page 213

8. Loosen the bolts in the reverse order in several steps.
Remove the crankcase and measure the width of the
crushed Plastigauge on each main journal. Replace the
bearings if greater than the specified limit.
Crankshaft Main Journal Oil Clearance:
0.012 to 0.044 mm (0.00047 to 0.00173 in)
Functional Limit:
0.060 mm (0.00236 in)
If the clearance is less than the specified value,
check that the inner diameter codes are as shown
below.
43) Inner Diameter of Cylinder/Crankcase
Bearing Holder (Inner Diameter Codes)
The top part of the cylinder is marked with the inner
diameter codes a to indicate the inner diameters of each
bearing holder. The inner diameter codes indicate the
following two types of bearings. Check the code and select
the bearing accordingly.
Inner diameter
code a
37.000 to 37.008 mm
A
(1.45669 to 1.45701 in)
37.008 to 37.016 mm
B
(1.45701 to 1.45732 in)
The inner diameter codes A and B indicate the
size of each bearing section.
44) Thickness of Metal Bearing (Color
of Inner Diameter Code)
The bearings are painted in a color a that indicates their
thickness. The colors indicate the following two types of
bearings. Use the proper bearings.
[Color (Inner Diameter Code)]
Blue
Red
4st 25/30 2022
Standard value Bearing color
Blue
Red
Thickness
1.488 to 1.494 mm
(0.05858 to 0.05882 in)
1.494 to 1.500 mm
(0.05882 to 0.05906 in)
5
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