|
My IO-320 does the same thing. I've discussed
it with several greybeard Lyc fliers among the local EAA group and they say it
is "after-firing," as opposed to "back-firing." After-firing is caused by
a too-rich idle mixture, they say. On their recommendation, I have started
leaning while taxiing, and it has cured the problem. I pull the mixture
back until it starts running rough, then enrichen by a 1/2 turn. Also
seems to help with the mag check during run-up (i.e. the plugs haven't gotten
carboned up as much as with the richer mixture).
YMMV.
Lee Metcalfe
N320WH - LNC2 - IO320 - 534 hrs. - Kansas
City
|