Spark plug reading

Spark plug reading

Postby hysteric » Fri Jan 22, 2021 11:02 pm

Thoughts on this picture:

Image
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Re: Spark plug reading

Postby Right hand drive » Sat Jan 23, 2021 1:16 am

No idea if it’s just me but I can’t see the complete right hand side of the picture. Barely half of those two plugs.
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Re: Spark plug reading

Postby ojh » Wed Jan 27, 2021 11:08 pm

They are all 'examples' and not out of the same engine, right? The biggest thing I see is that the 'Good' plug example haas too much timing and it it were under a load you'd see signs of detonation.
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Re: Spark plug reading

Postby Right hand drive » Thu Jan 28, 2021 7:03 am

Sorry, worked out the image.

From different engines, look at thread reach.

Agree with ojh on timing.
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