Reading sparkplugs

[65D100]

Now. I know an AFR or vacumn gauge is the best way to check if your running rich or lean, but Id like to know how you guys think my plugs look. I have seen quite a few different charts on how your plugs should look but I figured I would ask the professionals. Thanks a lot

 

[TT5.9mag]

You need to define the conditions under which the plug was colored.

 

[65D100]

Every day driving, mild build 360

 

[TT5.9mag]

Heat range looks close, timing looks good, idle may be a little rich, wot can’t be seen.

 

[TT5.9mag]

Show me the back of the ground strap.

 

[nutz]

seems a little black..rich ...is there any blueing on the threads ...read somewhere the blueing should in the middle if too close to the tip too cool ? if by the head too hot

 

[Newbomb Turk]

It’s pig rich.

I can see the fuel ring is almost to the top of the porcelain.

 

[TT5.9mag]

It’s pig rich.

I can see the fuel ring is almost to the top of the porcelain.

**** how did you see that? I’m on a phone and didn’t even try but now that you said it, YUP there it is right at the threads.