Crankshaft Inspection - Yamaha WaveRunner FX140 Service Manual

POWR
1
CRANKSHAFT
SERVICE POINTS
Crankshaft removal
1. Remove:
• Crankshaft 1
• Crankshaft journal lower bearings
(from the lower crankcase)
• Crankshaft journal upper bearings
(from the upper crankcase)
NOTE:
Identify the position of each crankshaft journal
bearing so that it can be reinstalled in its origi-
nal place.

Crankshaft inspection

1. Measure:
• Crankshaft runout
Out of specification → Replace the
crankshaft.
Maximum crankshaft runout:
0.03 mm (0.0012 in)
2. Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
Scratches/wear → Replace the crank-
shaft.
3. Measure:
• crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification → Replace the
crankshaft journal bearings.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance:
0.020–0.057 mm
(0.0008–0.0022 in)
5-98
E