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backfiring  ---  >Is this an
indication of a too lean idle mixture?<

During this maneuver, pull the mixture
towards idle cutoff.  If the backfiring
goes away and the engine keeps running
the engine is set too rich at idle.

I suspect you are too rich.

This is a problem that should be
corrected ASAP.  Extended idle at too
rich a misture can cause the engine
to not respond to throttle inputs (quit).

James B. Frantz
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