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rpmdiag
rpmdiag, Tech and Instructor
Category: Mercury
Satisfied Customers: 6863
Experience:  Since 1975
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It started up and was idling and just died and won't start.

Customer Question

It started up and was idling and just died and won't start. New plugs, had been running just fine.
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: Battrey in fine, It is turning over just fine
JA: What is the model/year of your Mercury?
Customer: 93 EFI
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Just new plugs
JA: Anything else you think the mechanic should know?
Customer: no it's been running just fine
Submitted: 3 months ago.
Category: Mercury
Expert:  rpmdiag replied 3 months ago.

Hi, I'm Ron and I will be helping you today.

Expert:  rpmdiag replied 3 months ago.

The problem can be a loss of spark or fuel. You can check for spark at the plugs with a spark tester.
You can check fuel pressure with a gauge and both of these tools should be available to you at your
local parts store for rent or purchase.

THanks, Ron

Customer: replied 3 months ago.
I've had this boat for 6 years and it has never failed to start. I had unloaded and idled up to the dock, put it in reverse and it died, and would not start.
I'm pretty sure I'm not getting spark, what do I need to check if not getting fire? Cool?
Expert:  rpmdiag replied 3 months ago.

A spark tester attached to the plug between the wire/coil and plug , then crank it and watch for a strong blue spark.

Thanks again and please remember to rate me and keep this link in case you need me again later on.

Ron

Expert:  rpmdiag replied 3 months ago.

Hi, I'm just following up with you to see if you have any more questions.
Thanks, Ron

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