1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 158Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 158

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377 CID6.2L ENGINES

Camshaft
Measuring Lobe Lift
NOTE: Procedure is similar to checking valve timingIf improper valve operation is indicated, measure lift of each push rod in