Selecting Of Cylinder/Crankcase Metal Bearing - TOHATSU MFS 60A Service Manual

Power Unit
8. Loosen bolts in reverse order in several steps. Remove crank
case and measure width of crushed plasti-gauge on each
main journal. Replace bearing if the width is over specified
value.
Crankshaft Main Journal Oil Clearance :
0.020 to 0.041 mm (0.00079 to 0.00161 in)
Functional Limit :
0.060 mm (0.00236 in)
If the clearance is less than specified value, check
that inner diameter code is as shown below.
38) Selecting of Cylinder/Crankcase Metal
Bearing
Check that metal bearing inner diameter code a and
1
crankshaft journal outside diameter code b as shown below
chart.
Marked on cylinder upper section with inner diameter code
a that indicates inner diameter of each bearing holder.
There are three types of bearing in accordance with inner
diameter code.
Code
1 44.000 to 44.004 mm (1.73228 to 1.73244 in)
2 44.005 to 44.009 mm (1.73248 to 1.73263 in)
3 44.010 to 44.014 mm (1.73267 to 1.73283 in)
And, crankshaft is marked on its upper section with outer
diameter code b that indicates outer diameter of each
crankshaft journal.
Code
A 39.996 to 40.000 mm (1.57464 to 1.57480 in)
B 39.971 to 39.975 mm (1.57444 to 1.57460 in)
C 39.986 to 39.990 mm (1.57425 to 1.57441 in)
5-48
Inner Diameter
Outer Diameter
mm
a
a Inner Diameter Code b Outer Diameter Code
a
I II
2 2 2 2
b
in
b
III IV
4st 60 2019