Inboard Motors Mercury Mercruiser 1964-1991 service manual, Page 565Get this manual
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ENGINE SPECIFICATIONS
Main Journal Diameter NO1
0.003-0.007" 0.0762-0.1778mrn 0.00 15" Max 0.0381rnm Max
0.006-0.010" 0.1 52-0.254rnrn 0.00 15" Max 0.0381mm Max<