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  1. #1
    DrWeaseL's Avatar
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    NGK LFR6AIX-11 Iridium IX Spark Plug 09 fx cruiser sho?

    Attachment 232301Has anyone tried different plugs in their FX SHO?

    the stock plug is the LFR6, so is it safe to use a better plug from the same NGK manufacturer? I was thinking of these:
    NGK (6619) LFR6AIX-11 Iridium IX Spark Plug
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    Last edited by DrWeaseL; 03-14-2011 at 10:50 AM. Reason: picture issues


  2. #2

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    im certain some people have used them with ok results.. guessing they are not cheap tho..

  3. #3
    Site Admin Green Hulk's Avatar
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    I used to use the Denso Iridium plugs on my seadoo's and went back to the stock NGK's. There was no benefit to using the Iridiums and I didn't get longer life out of them.

  4. #4
    DrWeaseL's Avatar
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    Excellent, thanks so much for the response!
    Have you by chance used that lucas oil fuel conditioner? i use that in my truck and get about 2mpg more and i wrote the company and they assured me that it would not harm and would actually increase my engine life of the yamaha!


  5. #5
    bex's Avatar
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    I am using the lucas as a top end lube on my FX140 MR1 engine.

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