1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 384Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 384

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DIAGNOSTICS
Step Action Was the "On-Board Diagnostic" (OBD) System Check Performed? Are you using Scan Tool? aThrottle closedbIgnition ON3 Does scan tool indicate throttle position sensor voltag

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