-------------- Original message from Mark Steitle <msteitle@gmail.com>: --------------

Al,

 

I'm using the NGK "Laser Iridium" spark plugs as recommended for the Renesis engines, p/n RE7C-L and RE9B-T.  You can get them for about $20/ea + shipping on EBAY. 

Mark

On Wed, Oct 21, 2009 at 10:03 AM, Al Gietzen <ALVentures@cox.net> wrote:

 

I have at least 60-70 hrs on the Iridium plugs and they are performing flawlessly.  I pulled them out and took a look a few hours ago and they looked great, so I put them back in.  As far as I'm concerned, Iridiums are the only plugs I will use from here on.  This could change if I have to start burning 100LL.

 Mark S.

 

Mark,

Are you using the Denso IRT 0131 plug?  I looked at those, but I can get 6 sets of the NGK B9EGV for the same amount of money, and get some change back. I change them at about 35 - 40 hours, or a less if I burn a couple tanks of 100LL. But I guess if the iridium will go 200 hours it would be worth the cost.

 

Al G