Piston Pin - Mercury FourStroke 2.5 Service Manual

Powerhead
Piston
Outside diameter (standard)
Outside diameter (service limit)
Clearance (standard)
Clearance (service limit)
3. To determine a piston to cylinder wall clearance, use this formula:
• Minimum cylinder bore measurement – maximum piston diameter measurement = piston to cylinder wall clearance.

Piston Pin

1. Measure the piston pin.
Piston Pin
Inside diameter (standard)
Inside diameter (service)
2. Place the piston pin into the connecting rod and check for free play. There should be no noticeable free play. Replace the
pin and/or the connecting rod as necessary.
3. Place the piston pin into the piston and check for free play. There should be no noticeable free play. Replace the pin and/or
the piston as necessary.
Page 4A-26
54.96 mm (2.1638 in.)
54.90 mm (2.1614 in.)
0.02–0.06 mm (0.00078–0.00236 in.)
0.15 mm (0.0059 in.)
3132
14.0 mm (0.5512 in.)
13.97 mm (0.550 in.)
3133
3134
90-8M0065421 NOVEMBER 2012