Grr. Black smoke from the exhaust

[JetBote]

Re: Grr. Black smoke from the exhaust

In addition, the NGK site states that the nose is self cleaning. This is true, but the other areas needed to get an accurate plug reading are tainted and do not self clean. Those areas are the tip, the porcelain, the threads, and the strap. All those areas are crucial to know what your engine us doing, and what it needs. But hey, you already know that.

 

[Angrywasp]

Re: Grr. Black smoke from the exhaust

Oh, the guy that doesn't know what black exhaust means, nor knows the difference between an oil and engine temp gauge is versed in spark plugs? Ok.

Umm. When did I say I didn't know what black smoke indicated? If any of my petroleum powered equipment (own gas (2 and 4 stroke) and diesel) starts pumping out black smoke suddenly I'm going to have questions as to why? Hence I asked for ideas and others gave suggestions that I have tried and will try. I'll take the water temp shot though since I've never seen a circle with a line bisecting it with three vertical lines under it as a water temp emblem. You can feel free to wander away from my thread now and share your "knowledge" with others.

For your follow up post: The only issue I had with the motor regarding the plugs is the rich condition which suddenly got worse so I only need the nose condition to determine if I have the mix correct. Now the other parts of the plug come into play if the plug has been over/under torqued, improperly gapped, or too hot/cold for the application and generally they give much less subtle indications like cracking, burning away, or melting.

 

[Utahboatnut]

Re: Grr. Black smoke from the exhaust

If it were me I would get the compression numbers all over the place thing worked out before I did anything else. Low compression even in one cyl. makes for impossible tuning.