Mercury MERCRUISER - Connecting Rod; Crankshaft; Piston Pin; Valve

Oil Control
Description 6.2 Liter (377 cid)
Groove clearance Production 0.020–0.165 mm (0.0008–0.0065 in.)
Gap Production 0.18–0.72 mm (0.007–0.028 in.)
Piston Pin
Description 6.2 Liter (377 cid)
Diameter 21.997–22.000 mm (0.8660–0.8661 in.)
Clearance Production 0.004–0.014 mm (0.0002–0.0005 in.)
Clearance in connecting rod 0.016–0.029 mm (0.0006–0.0011 in.) interference
Crankshaft
Main Bearing Journal
Description 6.2 Liter (377 cid)
Diameter
Number 1, 2, 3, 4 62.195–62.215 mm (2.4486–2.4494 in.)
Number 5 62.181–62.201 mm (2.4481–2.4488 in.)
Taper Production 0.008 mm (0.0003 in.) maximum
Out of round Production 0.008 mm (0.0003 in.) maximum
Main Bearing Clearance
Description 6.2 Liter (377 cid)
Production
Number 1, 2, 3, 4 0.043–0.107 mm (0.0017–0.0042 in.)
Number 5 0.043–0.107 mm (0.0017–0.0042 in.)
Connecting Rod Journal
Description 6.2 Liter (377 cid)
Diameter 53.3095–53.3295 mm (2.0988–2.0995 in.)
Taper Production 0.005 mm (0.0002 in.) maximum
Out of round Production 0.008 mm (0.0003 in.) maximum
Miscellaneous
Description 6.2 Liter (377 cid)
Runout 0.065 mm (0.0025 in.) maximum
End play (thrust clearance) 0.025–0.305 mm (0.001–0.012 in.)
Connecting Rod
Connecting Rod Bearing
Description
6.2 Liter (377 cid)
Clearance Production 0.047–0.110 mm (0.0019–0.0043 in.)
Rod side clearance 0.312–0.588 mm (0.013–0.023 in.)
Valve
Clearance (Lash)
Description
6.2 Liter (377 cid)
Intake and exhaust
Net lash
No adjustment
Engine Inspection and Assembly
Page 3B-4 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015