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Hello my name is ***** ***** am I speaking with?
All Mercurys are cataloged by serial number, can I start by getting that number so I know what you have.
Hi John, got it.
Did you need help troubleshooting the issue or did you just need a wiring diagram?
What's the story on the engine, when did it last run?
Is the emergency stop switch clip in place?
Wiring diagrams and service manuals I have. But I'm not going to be able to help you actually troubleshoot this. The ECM provides the grounds on the circuit, if the ECM is not grounding out the fuel pump, then either you have a bad ECM or a bad sensor on the engine not telling the ECM to turn on. Either way it would have to go into the dealer to be hooked up to a scan tool.
You bet, good luck.