Checking The Connecting Rod Big-End Oil Clearance - Yamaha F115A Wartungshandbuch

POWR
CRANKSHAFT AND PISTON/
CONNECTING ROD ASSEMBLY
CAUTION:
The (*) mark indicates that the color of the
upper and lower bearings are different.
Install the main-bearings in the middle of
the cylinder block and crankcase journal so
they do not block the oil holes.
NOTE:
Crankshaft bearing #3 is a thrust bearing.
(3) If the difference between the cylinder
block journal diameter and crankshaft
journal diameter is more than the max-
imum value (6.058 mm), replace the
crankshaft, cylinder block, or both.
CHECKING THE CONNECTING ROD
BIG-END OIL CLEARANCE
CAUTION:
• Mark the original connecting rod bolts so
they are not confused with the new bolts.
• Do not reuse the original connecting rod
bolts during assembly, only use them
when measuring and adjusting the oil
clearance.
• Before assembly, remove any small metal
particles from the big- end mating surface
and also thoroughly clean it.
1. Measure:
• Big-end oil clearance
Out of specification → Replace the
upper and lower bearings as a set.
Big-end oil clearance
0.025 - 0.031 mm
(0.0010 - 0.0012 in)
NOTE:
Measure the big-end oil clearance at room
temperature (20 ˚C (68 ˚F)).
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