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Thread: spark plug gap 80 HP Rotax 912

  1. #1

    Default spark plug gap 80 HP Rotax 912

    Checking to see what folks are gapping their NGK DCPR7E plugs on the 80 hp 912 ul.
    Thanks a lot,
    Mark Donahue

  2. #2
    Senior Member rv9ralph's Avatar
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    Aug 2014
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    Default Re: spark plug gap 80 HP Rotax 912

    Here are the specs I have:

    Spark Plug NGK DCPR7E 12mm
    Gap:
    New: 0.6-0.7 mm (0.023-0.027)
    Wear Limit: 0.9 mm (0.035)
    Torque Plugs to: 20 Nm (177 in.lb.)

    Ralph

  3. #3

    Default Re: spark plug gap 80 HP Rotax 912

    Thanks Ralph,
    For some reason I was thinking that folks reduced that gap a bit for easier starting/running.
    But I cant trust my memory anymore.
    Take care,
    Mark

  4. #4
    Super Moderator Av8r3400's Avatar
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    Default Re: spark plug gap 80 HP Rotax 912

    I have a Zipper big bore on my 912UL. So it is a little different than stock. I am using DCPR8E plugs.

    On Hal Stockman's advise, I gap at .022-.024". So, on the tight end or a little less than OEM spec. It has aided in cold starts and general idle quality.

    I replace them annually regardless of hours so wear is not a factor.
    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
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  5. #5

    Default Re: spark plug gap 80 HP Rotax 912

    Thanks, that was what I vaguely remembered.
    Appreciate the info.
    Mark

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