1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 270Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 270

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FUEL INJECTION SYSTEM DESCRIPTIONOPERATION

ECM Control ModuleIgnition Coil Trigger SignalBatteryRelayModule AdvanceSignal ConverterPick Up CoilGroundManifoldCoolant Temperature