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Thread: Ash deposits on 912ULS spark plugs

  1. #11
    Senior Member Dave S's Avatar
    Join Date
    Oct 2008
    Location
    St Paul, MN
    Posts
    1,833

    Default Re: Ash deposits on 912ULS spark plugs

    Dan,

    Not bad! Looks so much better that the first photos you showed with the grunty plugs.

    If I recall, Decalin states the recommended amount as a minimum.

    Maybe this is a legitimate example of "Mores Law"....If some is good, more is better and too much is just right.

    I think you convinced me to increase the amount of Decalin I use when occasionally burning 100LL.

    Good work.
    Dave S
    Kitfox 7 Trigear (Flying since 2009)
    912ULS Warp Drive

    St Paul, MN

  2. #12

    Join Date
    Sep 2012
    Location
    San Francisco
    Posts
    97

    Default Re: Ash deposits on 912ULS spark plugs

    Quote Originally Posted by Dave S View Post

    Maybe this is a legitimate example of "Mores Law"....If some is good, more is better and too much is just right.

    .
    LOL! By the time I zero in on precisely the right amount of Decalin, we will have lead free aviation gas at all our pumps. In the meantime, on this next plug change my experiment is to use 50% more than recommended rather than double the recommended amount.

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