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  1. ☑ ORIGINAL POSTER #1
    Member Adam X20's Avatar
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    2003 Challenger X 20 Merc Opti 250
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    Default Merc Optimax 250 Spark plugs

    Does anyone have Service Manual for Merc 250 Optimax?

    I need to know what Spark Plugs are specified for the motor,
    and gap too...

    Thank-you!

    Adam.

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  3. #2
    Dr Honda's Avatar
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    Default

    Since you are a premium member, you can get it here. But...


    NGK PZFR5F-11

    Gap; 0.043

    Hope that helps
    Tony

    PM or post for help. Don't leave questions in my profile box. (i never check it)

    I'm not going to be able to do vinyl or carbs for a while. Starting my new job is taking a lot of time

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  4. ☑ ORIGINAL POSTER #3
    Member Adam X20's Avatar
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    Default

    I found NGK ZFR5F-11
    (no P) NGK PZFR5F-11
    what does the P represent?

    Is there a iridium plug available?

    Thanks,
    Adam

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  5. ☑ ORIGINAL POSTER #4
    Member Adam X20's Avatar
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    Exclamation Wrong Plug type!

    Bought the plugs the manual advised : NGK PZFR5F-11

    Turns out they are not the only type!

    My motor uses IZFR5G (still Laser Iridium type)

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