Yamaha F50F, Service Manual

Page: 135 / 305

6C13G11
5-44
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9
3. Select the suitable color
b
for the con-
necting rod bearing from the table.
Checking the crankshaft journal oil
clearance
1. Clean the bearings, crankshaft journals,
and bearing portions of the crankcase
and cylinder block.
2. Place the cylinder block upside down on
a bench.
3. Install half of the bearings
1
and the
crankshaft
2
into the cylinder block
3
.
NOTE:
• Install the main bearings in their original
positions.
• Insert the projection
a
of each bearing into
the slots in the cylinder block.
4. Put a piece of Plastigauge (PG-1) on
each crankshaft journal parallel to the
crankshaft.
NOTE:
Do not put the Plastigauge (PG-1) over the
oil hole in the main journals of the crankshaft.
5. Install the remaining half of the bearings
into the crankcase.
NOTE:
• Install the main bearings in their original
positions.
• Insert the projection of each bearing into
the slots in the crankcase.
Connecting
rod mark/color
Crankpin
mark
Bearing
color
I /Red A Yellow
I
/Red B
Red
II /Blue A
II
/Blue B
Pink
III /Yellow A
III
/Yellow B Green
Cylinder block