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2003 4 cycle efi 40 hp, fuel injection not working and no spark,

Customer Question
has new emc, motor was...
2003 4 cycle efi 40 hp, fuel injection not working and no spark, has new emc, motor was under water for awhile, has been run since, dried out, oil changed, clean and dried all connections
Submitted: 8 years ago.Category: Boat
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Answered in 4 hours by:
6/24/2010
Marine Mechanic: Michael, Master Mechanic replied 8 years ago
Michael
Michael, Master Mechanic
Category: Boat
Satisfied Customers: 257
Experience: Over 25 years experience working on everything from PWC's to Mega Yachts
Verified
Hi, thanks for your question..
Your spark problem is most likely the stator... if the stator fails you loose all power to the brain box and in turn... the fuel injection. First check your main ign. fuse.... if your confident all electrical connections are good then next thing would be the stator(alternator) which is under the flywheel. This is approx a two hour job for a competent outboard mechanic.
None of the electrical components on a fuel injected motor like being submerged and I have had to replace stators before because they were submerged at one point.
Also, be sure to completely purge your entire fuel injection system, any residual moisture can cause injector failure.
I hope this helps.. let me know if you need further assistance. If you feel my answer has helped, please click the accept button to accept my answer... you will still be able to post follow up questions.

Best regards,

Michael

Edited by Michael on 6/24/2010 at 6:20 AM EST
Michael
Michael, Master Mechanic
Category: Boat
Satisfied Customers: 257
Experience: Over 25 years experience working on everything from PWC's to Mega Yachts
Verified
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Customer reply replied 8 years ago

Hi Mike, thanks for the answer, I will change the stator, this is a Mercury motor, has 40 plus psi fuel pressure, there is fuel all the way to the injectors, fuel system has been purged, It beeps the ok beep when you turn the key, I omhed the stator it omhed ok, do you know what size the bolts are to pull the flyweel? How about the voltage regulator, it apears sealed could that take being submerged and would the injectors and spark work if that were bad.

Thank you, Tom

Marine Mechanic: Michael, Master Mechanic replied 8 years ago
Hi Tom,
a bad voltage regaultor will only keep the charging circuit from charging the battery, if the battery has good voltage the engine will still run fine untill the battery is run down.
I still think it's the stator acording to the information you provided.

Best regards,

Michael
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