Perry Mick wrote:

I guess I was lucky on my return flight from Copperstate,
in that the fouling was just starting and the plugs quickly
recovered.  After I got back home it got much worse.
I still had about 20 gallons of evil gas in my tanks when
I got home.  The first couple short flights the fouling was
worse, it would not clear up.  So I took the plugs out and
cleaned them, added 10 gallons of mogas to the remaining
10 gallons of 100LL.  It was fine again until today.  Plugs
were once again fouled after operating a couple hours on
50% mogas/50% avgas. Would not clear.  Now I've
added more mogas, probably down to a 25% avgas mixture,
and I'm going to have to take the plugs out again and clean
them once more.

I'm using BUR9EQP trailing platinum plugs in all four
locations.  I think this makes the fouling worse since
the 9 is a colder plug.

--
Perry Mick
Duckt N7XR
http://www.ductedfan.com

 
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