Yamaha F225F, Service Manual

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7-82
Cylinder block
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A
Checking the crankpin oil clearance
1. Clean the crankpin bearings, connecting
rod, connecting rod cap, and crankpin.
2. Install the crankpin bearings
a
into the
connecting rod
a
and connecting rod
cap
b
.
TIP:
Install the crankpin bearings in the original
positions.
3. Place a piece of Plastigauge (PG-1) on
the crankpin
c
, parallel to the
crankshaft.
TIP:
Do not place the Plastigauge (PG-1) over the
oil hole in the crankpin of the crankshaft.
4. Install the connecting rod
a
and
connecting rod cap
b
onto the crankpin
c
.
TIP:
• When checking the oil clearance, reuse the
removed connecting rod bolts.
• Make sure that the marks
d
on the con-
necting rod
a
and connecting rod cap
b
face toward the flywheel magnet end of the
crankshaft.
• Do not turn the connecting rod until the
crankpin oil clearance measurement has
been completed.
5. Tighten the bolts
b
to the specified
torques in 2 stages.
a
b
a
c
Connecting rod bolt
b
:
1st: 40 N·m (4.0 kgf·m, 29.5 ft·lb)
2nd: 90°
c
d
a
b
e
b
90˚