Checking The Crankpin Oil Clearance - Yamaha F2.5A Service Manual

Crankpin diameter a:
23.969–23.984 mm
(0.9437–0.9443 in)
Crankpin width b:
21.0–21.1 mm (0.827–0.831 in)
3. Measure the crankshaft runout. Replace
the crankshaft if out of specification.
Crank stand alignment:
90890-03107
Crankshaft runout limit:
0.01 mm (0.0004 in)

Checking the crankpin oil clearance

1. Clean the connecting rod.
2. Put a piece of Plastigauge
the crankpin, parallel to the crankshaft.
69M3E11
b
S69M5690
S69M5610
®
(PG-1) onto
NOTE:
Be sure not to put the Plastigauge (PG-1)
over the oil hole in the crankpin of the crank-
shaft.
3. Install the connecting rod to the crankpin
1.
NOTE:
Align the marks a on the connecting rod cap
and connecting rod.
Cylinder block
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