1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 122Get this manual
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377 CID6.2L ENGINES
aSeat Angle (45) (IntakeExhaust)Seat Width Intake .040-.065 In(1.02-1.65 mm) Exhaust .065-.098 In(1.65-2.49 mm)
90-840500 MARCH 2000
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