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Spark Plug Color

by Arnaldo Pessina in 912 / 914 Technical Questions 5 years ago

Hi. I´m just wondering if the yelow color on my spark plug are ok. I attached some photos

912 S Engine

change spark plug every 80 hours.

avgas 100LL only

7809_1_20200226_135605.jpg (You do not have access to download this file.)

7809_1_20200226_135608.jpg (You do not have access to download this file.)

7809_1_20200226_135504.jpg (You do not have access to download this file.)

7809_1_20200226_135623.jpg (You do not have access to download this file.)

7809_1_20200226_135627.jpg (You do not have access to download this file.)

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Re: Spark Plug Color

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.99k

Those are lead deposits.

One of the reasons to avoid 100LL if possible.

But nothing out of the ordinary or unusual.

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

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Re: Spark Plug Color

by Wayne Fowler » 5 years ago

Wayne Fowler

1 46 271

No thermal paste on the plug threads?

Regards........Chook.

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Re: Spark Plug Color

by Garrett Wysocki » 5 years ago

Garrett Wysocki

1 572 1.45k

https://decalinchemicals.com/products/decalin-runup-fuel-additive/

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Re: Spark Plug Color

by Arnaldo Pessina » 5 years ago

Arnaldo Pessina

16 16 25

Unfortunately we can´t find Decalin in Brazil and our mogas is with 27% alcohol.

Only option AVGAS which price is 86% more than mogas.

Thanks Arnaldo

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Re: Spark Plug Color

by James Ott » 5 years ago

James Ott

22 338 407

You can order Decalin online from Aircraft Spruce.

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