YAMAHA Marine 100A Manuel D'entretien page 302

POWR
CYLINDER BODY ASSEMBLY
5460
5470
INSPECTING THE PISTON PINS AND
SMALL-END BEARINGS
1. Inspect:
• Piston pin
• Small-end bearing
Heat discoloration → Replace.
Damage/scratches → Replace.
2. Measure:
• Piston pin diameter
(with a micrometer)
Out of specification → Replace.
Piston pin diameter
Except for E115A:
23.065 - 23.070 mm
(0.9081 - 0.9083 in)
For 115A:
21.495 - 21.500 mm
(0.8463 - 0.8465 in)
3. Measure:
• Piston pin boss diameter
(with a micrometer)
Out of specification → Replace.
Piston pin boss diameter
Except for E115A:
23.074 - 23.085 mm
(0.9084 - 0.9089 in)
For 115A:
21.504 - 21.510 mm
(0.8466 - 0.8468 in)
INSPECTING THE PISTON RINGS
NOTE:
• Before inspecting the piston rings, be sure
to inspect the cylinder body.
• Piston rings should always be replaced as
a set (per piston).
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E
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