Mercury Workshop Service and Repair Manuals

Crankshaft: Specifications

Crankshaft

Main bearing journal

Diameter........................................................................................................................................................ 67.483-67.503 mm (2.6568-2.6576 inch)
Maximum taper....................................................................................................................................................................... 0.004 mm (0.0002 inch) 
Maximum-out-of-round.................................................................................................................... 0.0075 mm (0.0003 inch) between cross sections
Journal-to-cylinder block clearance................................................................................................................. 0.066-0.024 mm (0.0259-0.0009 inch) 

Connecting rod journal

Diameter........................................................................................................................................................ 53.003-52.983 mm (2.0867-2.0859 inch)
Maximum taper (straightness)................................................................................................................................................ 0.004 mm (0.0002 inch) 
Maximum-out-of-round.................................................................................................................... 0.0075 mm (0.0003 inch) between cross sections

Crankshaft maximum end play...................................................................................................................................................... 0.301 mm (0.0118 inch)
Main bearing bore inside diameter........................................................................................................................ 72.40-72.424 mm (2.8504-2.8513 inch)