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Author Topic: M 90 hit/miss misadventure update success  (Read 1264 times)

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Re: M 90 hit/miss misadventure update success
« on: January 26, 2020, 08:39:36 pm »
The cylinder head "sooty mess"...was that a Dry or Wet nature mess condition that could indicate an over-rich A/F needle valve setting or wet soot usually an excessive oily fuel/lubricant mixture. Thx for any info, tom.

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