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    1997 mercruiser 350 mag loss of power

    It is carbureted. Crazy thing is I don't see a fuel filter. The mechanical fuel pump goes straight to the carburetor. Does that seem right?
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    1997 mercruiser 350 mag loss of power

    I have a 1997 mercruiser 350 mag. Runs great for a mile then loses power when I give it the gas. Where do I start?
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    Mercruiser 5.7 no start/power to the starter

    Mercuiser 5.7 no start I turn the key hear a fast clicking but starter not turning the flywheel. Replaced the starter still same problem.
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    Mercrusier 5.7 no power to injectors!

    Fixed! Put in a new ignition control module and it fired right up! Did not think it was this because I had a spark but I had an extra one so thought why not. I have gone through about 5 of them so far in 3 years.
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    Mercrusier 5.7 no power to injectors!

    Ok will do. Could be fuel pressure. I will check. Thanks!
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    Mercrusier 5.7 no power to injectors!

    Year 1995
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    Mercrusier 5.7 no power to injectors!

  8. T

    Mercrusier 5.7 no power to injectors!

    Had the boat for 3 years. Run it alot! I live on a lake. Just started last week! Thanks again!
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    Mercrusier 5.7 no power to injectors!

    F349479 serial Number Tach does goes up to at least 300 rpm
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    Mercrusier 5.7 no power to injectors!

    Yes there is 12v on one side of the injector. But the ground back to the ECM does not appear to be good! What does that mean. Thanks again!
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    Mercrusier 5.7 no power to injectors!

    No Power at the ecm#21. Guess I need to replace that breaker. Question could that breaker be bad and still I have spark and power to the fuel Pump>
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    Mercrusier 5.7 no power to injectors!

    n
  13. T

    Mercrusier 5.7 no power to injectors!

    Pretty much no voltage read! Thanks I starting right now to check power at the ecm#21
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    Mercrusier 5.7 no power to injectors!

    Pretty much no voltage read! No, I did see there is 12v on the fuel pump. So I ran a jump to the injector and it sprayed fuel!
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    Mercrusier 5.7 no power to injectors!

    Thanks! I check it in the next hour or two!
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    Mercrusier 5.7 no power to injectors!

    They all look good. Any other thoughts? Thank you for your time and effort!
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    Mercrusier 5.7 no power to injectors!

    EFI
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    Mercrusier 5.7 no power to injectors!

    Throttle body
  19. T

    Mercrusier 5.7 no power to injectors!

    I have spark, fuel pump working but no power to the fuel injectors. Any thoughts much appreciated! Injector fuse looks good!
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