1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 57Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 57

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TROUBLESHOOTING
Also refer to "Poor Boat Performance" Crankcase overfilled with oil Anti-siphon valve Plugged fuel tank vent Improper fuel supply Incorrect ignition timing Low grade of fuel or w

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