Yamaha FX140, Руководство по обслуживанию

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5-94
E
POWR
CONNECTING RODS AND PISTONS
Connecting rod inspection
1. Measure:
• Crankshaft-pin-to-big-end-bearing
clearance
Out of specification
→
Replace the big
end bearings.
Crankshaft-pin-to-big-end-
bearing clearance:
0.016–0.040 mm
(0.0006–0.0016 in)
Measurement steps:
The following procedure applies to all of the
connecting rods.
CAUTION:
Do not interchange the big end bearings
and connecting rods. To obtain the cor-
rect crankshaft-pin-to-big-end-bearing
clearance and prevent engine damage,
the big end bearings must be installed in
their original positions.
• Clean the big end bearings, crankshaft
pins, and the inside of the connecting rod
halves.
• Install the big end upper bearing into the
connecting rod and the big end lower
bearing into the connecting rod cap.
NOTE:
Align the projections
a
on the big end bear-
ings with the notches
b
in the connecting
rod and connecting rod cap.
• Put a piece of Plastigauge
®
1
on the
crankshaft pin.
• Assemble the connecting rod halves.
1