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New Spark Plug Rotax 912

in 912iS Technical Questions 7 years ago

  • Re: New Spark Plug Rotax 912

    by » 5 years ago

    Sorry for two stupid questions about plugs, but here goes: (both refer to NGK DCPR8E).
    1. Should I remove the screw-on removable cap from the top of the plug before connecting the spark plug wire?

    2. Do I apply the 897 186 heat transfer paste to the three innermost threads on the plug, or to all the threads EXCEPT the innermost 3?

    Thanks,
    John Smoyer
    912 ULS Just Escapade N280MJ
      
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  • Re: New Spark Plug Rotax 912

    by » 5 years ago

    Hi John,

    Yes and yes

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: New Spark Plug Rotax 912

    by » 5 years ago

    Regarding the paste, you want to avoid putting it on the three deepest threads, the reason being that you don't want to get any on the end of the plug. It takes very little paste.
    Thank you said by: john smoyer
      
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  • Re: New Spark Plug Rotax 912

    by » 5 years ago

    You want the New plug to look like the one you just took out.
    So, Yes the Cap comes off.

    The Plug connector must fit properly onto the plug

    Line Maintenance Manual Chapter 05-20-00, Section 5.1, Page 15.
    [quote]Check that resistance spark plug connectors fit tightly on the spark plugs.
    Minimum pull-off force is 30 N (7 lb).[/quote]


    You want to apply the Paste to the Middle 4-5 Threads
    Rotax Minute - Spark Plug Thermal Paste
    https://www.rotax-owner.com/en/videos-topmenu/rotax-minute/399-2-oil-inj247

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
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  • Re: New Spark Plug Rotax 912

    by » 5 years ago

    Thank you, Bill, Roger, and Ken. This is exactly what I need. Bill, special thanks for the references.
    Wow, the paste is fantastically expensive!
    This is a great forum,

    John S
      
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