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  1. #1
    abie_lah's Avatar
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    perfomance spark plug for 4tec engine..

    before this im use onle oem spark plug in all seadoo ski in my garage,,im tr to get iridium spark plug suitable with 4tec s/c engine,, only have densoiridium ixu 22 in malaysia market and i know its little bit higher heating rate if compare with oem plug,,,
    i go at les cooke seadoo centre last week and his suggest to use denso ixu27,,
    badly only have a 6 piece in their store,, im try to find it at other store but cannot,,
    where i can buy it??or i can use denso ixu22???


  2. #2
    Site Admin Green Hulk's Avatar
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    The Denso IXU27 is the correct plug, but I can tell you they are not worth the extra expense. I used to run them and went back to the stock NGK plugs.
    The Denso's would not last any longer than the stock plugs which are only $3.50 each

  3. #3
    Eric Ocman's Avatar
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    Quote Originally Posted by Green Hulk View Post
    The Denso IXU27 is the correct plug, but I can tell you they are not worth the extra expense. I used to run them and went back to the stock NGK plugs.
    The Denso's would not last any longer than the stock plugs which are only $3.50 each
    +1

  4. #4
    abie_lah's Avatar
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    but thats is iridium plug and little bit cool compare with oem,,, more safe on mod engine and fore race ski,,

  5. #5
    Moderator Snoman's Avatar
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    The Densos' Work well if you are a tad rich and have no way to adjust on your ski...Back when RRFPR and fuel controllers were not heard of in our PWC world I ran the NGKs and the ski would spit and sputter until the ski would warm up..I switched to the Densos and the ski never did that again...My setup is now completely different but i am still using the same plugs with no issues...

  6. #6
    Eric Ocman's Avatar
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    Quote Originally Posted by Snoman View Post
    The Densos' Work well if you are a tad rich and have no way to adjust on your ski...Back when RRFPR and fuel controllers were not heard of in our PWC world I ran the NGKs and the ski would spit and sputter until the ski would warm up..I switched to the Densos and the ski never did that again...My setup is now completely different but i am still using the same plugs with no issues...
    I had completely opposite experience. The denso fouled from being a tad rich and spit sputtered etc. I changed back to stock.

  7. #7
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by abie_lah View Post
    but thats is iridium plug and little bit cool compare with oem,,, more safe on mod engine and fore race ski,,
    I ran stock NGK plugs on my turbo RXP with 18 psi boost and they worked great. I would change them out every 25 hours regardless, they were not fouled.
    The Denso Iridiums would foul out at 25-30 hours so I went back to the stock plugs.

  8. #8
    Moderator Snoman's Avatar
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    Ive only had one plug foul and it was an OEM one believe it or not..LOL..Plug choices are all ones preference,some say this one works while others say that one works,its whatever works the best in your ski..The OEM ones do work well with little issues and are a 1/3rd cheaper than the Densos..

  9. #9
    My ski is rich at idle 11:1. The ski starts and idles better with the Densos. I put 100 hours on my first set of Densos.

    Mark

  10. #10
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    Wow... you guys are really missing the boat here

    Split Fire's add like 12 HP

    Click image for larger version. 

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    And they last 3 years ...

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