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  1. #1
    Cadet
    Join Date
    Apr 2007
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    2

    Default 2005 Optimax 225 spark plugs

    Can anyone tell me what are the proper NGK plugs to use for this engine? I have looked all over a bunch of forums and nobody yet has told me the part # for the plugs for this engine. Can anyone help please.

  2. #2
    Petty Officer 1st Class
    Join Date
    Dec 2006
    Location
    Panama City, FL
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    328

    Default Re: 2005 Optimax 225 spark plugs

    In about one minute I went to the NGK site and got this number PZFR5F-11. NGK is a very good plug, maybe it'll help that Opti-Pop.

  3. #3
    Cadet
    Join Date
    Apr 2007
    Posts
    2

    Default Re: 2005 Optimax 225 spark plugs

    I saw that also. That is for the 1998-2002 model. Can that be used in a 2005 model?

  4. #4
    Honorary Moderator Emeritus Don S's Avatar
    Join Date
    Aug 2004
    Location
    Western WA.
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    62,323

    Default Re: 2005 Optimax 225 spark plugs

    With an engine SN, I could tell you what Mercs recommendation from the service manual is. without a SN, it would just be guessing.
    Don S.


    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

  5. #5
    Supreme Mariner Silvertip's Avatar
    Join Date
    Sep 2003
    Location
    Midwest
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    25,770

    Default Re: 2005 Optimax 225 spark plugs

    Don't know about the Opti's but on some engines there is a sticker on the engine block with the timing and spark plug information. The owners manual should also contain that information.

  6. #6

    Default Re: 2005 Optimax 225 spark plugs

    Right out of my Mercury Book- for my 2005 225 Mercury Optimax is:

    NGK IZFR5G

    .8 mm or ( .031 in ) GAP



    DELRUS

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