Yamaha F15A - Crankshaft Inspection; Crankshaft Journal Oil Clearance

E
CRANKCASE AND CRANKSHAFT
POWR
a
b
2. Measure:
9 Side clearance
Out of specification → Replace the
piston and piston rings as a set.
NOTE:
Measure the clearance at a few different
points.
Crankshaft inspection
1. Measure:
9 Crankshaft runout
Out of specification → Replace the
crankshaft.
Crankshaft journal oil clearance
1. Measure:
9 Crankcase journal oil clearance
Out of specification → Replace the
bearings as a set.
5-40
Side clearance:
Top ring
aa
:
0.013 ~ 0.035 mm
(0.0005 ~ 0.0013 in)
2nd ring
bb
:
0.02 ~ 0.04 mm
(0.001 ~ 0.002 in)
Crankshaft runout limit:
0.03 mm (0.0012 in)
Crankshaft journal oil clearance:
0.012 ~ 0.045 mm
(0.0005 ~ 0.0018 in)