Thread: octane

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  1. 04-11-2018, 06:49 PM #1
    nitro3847
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    octane

    I have a 2004 Mercury 200 EFI 3.0 liter, does anyone know what octane fuel I need to use
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  2. Savage
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    #2 04-11-2018, 07:58 PM
    Click on this >>> Oil, Battery, Spark Plugs, Fuel and Fuel Additive Recommendations Updated 8/26/15


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  3. EuropeanAM
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    #3 04-12-2018, 11:38 AM
    Also, Please see the ANNOUNCEMENTS at the top of the Forum, and be sure to provide the REQUIRED info when posting. Thanks!


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  4. nitro3847
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    #4 04-15-2018, 10:16 AM
    Don or Savage I have a 2004 Mercury 200 EFI 3 Liter serial number 1B010821, am I correct with the plug QL77CC OR 941M WITH A GAP OF 0.40
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  5. EuropeanAM
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    #5 04-18-2018, 01:36 PM
    Yes, that would be correct.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
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  6. nitro3847
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    #6 04-21-2018, 06:33 PM
    Thank you Don, found two plugs gaped at 0.32 and four at 0.35 they are all at 0.40 now thanks again.
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