1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 95Get this manual
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377 CID6.2L ENGINES
CYLINDER BORE Diameter Out of Round Production Production Service Thrust Side Relief Side 4.0007-4.0027 (101.618-101.669) 0.0005 (0.12) Max 0.002 (0.05) Max 0.0005 (0.012) Ma