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I have no spark on my 5.7 Mercruiser

I have a 5.7 mercury not getting any spark to plugs.

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This is probably not a DIY project Mike. It could be the electronic ignition module or power to it. You could check all the fuses and find the ignition module and insure all the cables going to it from the wiring harness are plugged it tight. IF you can figure out the locks on the connectors, take them off and re-inset them. Look for water in the connectors or other foreign material that shouldn't be in them. Also, Look for broken or pinched wires around the module an wherever you can see wiring. You may get lucky! . The ignition module is the thing that all the spark plug wires go to.

Posted on Sep 16, 2015

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I got code PO 305 on a 2002 Mercury Grand Marquis, what is the spark plug wire part called, is it #5 coil, and should I replace the coil and spark plug and what should the spark plug be gapped at? Thank...


I got code PO 305 on a 2002 Mercury Grand Marquis, what is the spark plug wire part called
This will have a direct coil over ignition with a coil over each spark plug. The coil is the electrical part over the spark plug. The coil also has a rubber part that is called the boot or spark plug boot. The boots can be purchased separately but the coils will come with new boots.

is it #5 coil,

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TIM

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Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

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