Mercury Workshop Service and Repair Manuals

Crankshaft: Specifications

Crankshaft 

Main bearing journal

Diameter .................................................................................................................................................................. 56.980-57.0 mm (2.243-2.244 in)
Maximum taper .......................................................................................................................................................................... 0.008 mm (0.0003 in)
Maximum out-of-round .............................................................................................................................................................. 0.008 mm (0.0003 in)
Clearance-to-cylinder block ................................................................................................................................. 0.008-0.062 mm (0.0003-0.0024 in)

Connecting rod journal

Diameter .................................................................................................................................................................... 53.98-54.0 mm (2.125-2.126 in)
Maximum taper .......................................................................................................................................................................... 0.008 mm (0.0003 in)
Maximum out-of-round .............................................................................................................................................................. 0.008 mm (0.0003 in)

Maximum end play .......................................................................................................................................................... 0.05-0.32 mm (0.002-0.0126 in)

Main Bearings 

Clearance to crankshaft .............................................................................................................................................. 0.021-0.039 mm (0.0008-0.0015 in)
Clearance to crankshaft allowable ............................................................................................................................... 0.013-0.048 mm (0.0005-0.002 in)
Bearing wall thickness ................................................................................................................................................... 1.8-1.806 mm (0.0709-0.0711 in)