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Message started by wheelbender6 on 07/17/22 at 14:04:23

Title: A bit lean?
Post by wheelbender6 on 07/17/22 at 14:04:23

I checked my spark plug while I had the tank off for the Raptor petcock install.
-the plug is slightly darker than the photo shows.
Still looks lean to me. I am running a 150 jet, so I will try the 155.

Title: Re: A bit lean?
Post by ohiomoto on 07/17/22 at 17:39:30

That plug looks almost perfect to me. It's clean with no signs of burning. If our engines were water cooled you might see a bit more color around the perimeter. I'd throw a new one in three and be happy.

Also, 155 is way rich IMO if your motor is mostly stock. I think most people on here mistakenly think they should see some carbon fouling on their plug. You want clean a very light tan at the most.

Edit: https://www.championautoparts.com/Parts-Matter/automotive-repair-and-maintenance/how-to-read-spark-plugs.html

Title: Re: A bit lean?
Post by wheelbender6 on 07/17/22 at 18:00:31

That plug does look a bit old. The south winds can get salty in Houston, making things look older. The electrode didn't look so good either.
-I will stick with my current jetting.