1046 Spark Plug Question

[baldeaglejones]

I own a 1046 Cub for approx 2 yrs, this yr being the third. I was changing the plugs this spring, as I always do, and noticed the plug colors not being the tan color they are supposed to be. The plug on the left (when sitting on the tractor) was a chalky black and the one on the right was bright white. The motor seems to start and run ok. HELP!!

 

[JTKub]

That one plug could have taken a slug of gas on it's last shutdown. If it runs smooth, powerful and without a miss, I wouldn't sweat it.

Joel

 

[Fordlords]

I wouldn't sweat it either. Sometimes the compression release floods up the one cylinder on shutdown, making the plug black. This is also a contributor to the exhaust backfire sometimes heard on shutdown.

-Fordlords-

 

[baldeaglejones]

What about the bright white plug? What would make it so white...there is no sign of tan. It looks like it is extreamly lean. I don't want to run the risk of screwing up that cylinder. Also, the plug that is black is a powdery (sp?) black, not wet.

Thanks.