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Old 19th Aug 2018, 19:29
  #89 (permalink)  
Maoraigh1
 
Join Date: Oct 2007
Location: Moray,Scotland,U.K.
Posts: 1,471
At idle. Right off - mag drop - back to both. Left off - mag drop - back to both.
Both off for an instant, back on fast covers last possibility.
Could vapour mixture ignite to give a kick, without a plug spark, on a hot engine, at compression? This engine had been shut down for long enough that glowing carbon should not be possible. Outside temp 31C, and in the sun, higher under the cowling.
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