Checking The Crankshaft - Yamaha F150A Service Manual

Connecting rod big end side
clearance a:
0.14–0.31 mm (0.006–0.012 in)

Checking the crankshaft

1. Check the teeth of the crankshaft gear
for cracks or wear. Replace the crank-
shaft if necessary.
2. Measure the crankshaft journal diameter
a, crankpin diameter b, and crankpin
width c. Replace the crankshaft if out of
specification.
63P3F11
Crankshaft journal diameter a:
51.980–52.000 mm
(2.0465–2.0472 in)
Crankpin diameter b:
49.980–50.000 mm
(1.9677–1.9685 in)
Crankpin width c:
22.00–22.10 mm
(0.8661–0.8701 in)
3. Measure the crankshaft runout. Replace
the crankshaft if out of specification.
Crankshaft runout limit:
0.03 mm (0.0012 in)
Cylinder block
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S63P5550
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