> The attached picture may be of interest to the group. I did an early 200 hourly
> as a DI showed problems with the vacuum pump bracket.
> As you can see the NGK B9EV & B10EV spark plugs did not have much life left, one
> B10 and one B9 having no center electrode. She still ran as smooth as ever. The
> trailing plugs were changed to B10 (cooler) at 100 hrs, at which time they all
> looked like new. A check at 150 hrs showed all well. Then I started using Avgas
> with a few fills of unleaded mixed in.
> It would appear that Avgas is hard on plugs!
> I have now fitted B9EVX (leading) and B10EVX (trailing) These are platinum
> plugs. EV's are gold iridium. The platinum plugs have a cone shaped center
> electrode as against the gold iridium's thin wire.
>
> Ian Rotary RV6A Australia.
>
> >>  Homepage:  http://www.flyrotary.com/

    Ian,

     Thanks for the real world info on spark plugs. On another subject how is
 you "Ross" 2.85 holding up? From what you have reported your RV-6 is not a
 hangar queen. That outback trip put a good test to your entire installation.
     I have a "Ross" 2.85 and am always interested in your informative posts.

     Best Regards
     Kelly Troyer