Checking The Crankpin Oil Clearance - Yamaha F225F Service Manual

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.
a
a
b
TIP:
Install the crankpin bearings in the original
positions.
3. Place a piece of Plastigauge (PG-1) on
c,
the crankpin
crankshaft.
TIP:
Do not place the Plastigauge (PG-1) over the
oil hole in the crankpin of the crankshaft.
connecting rod a and
4. Install the
connecting rod cap b onto the crankpin
c.
parallel to the
c
b
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.
b
Connecting rod bolt b:
1st: 40 N·m (4.0 kgf·m, 29.5 ft·lb)
2nd: 90°
Cylinder block
0
a
d
1
2
c
3
4
5
6
7
e
8
90˚
9
10
A
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