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Originally posted by markp27
Anyone got any good photos of what a good plug should look like? Also pics of too rich and too lean would be good - I can add these to the FAQ.
I can't read a plug at the moment, as I'm not sure what a good one should look like
No photos but a good compression/carburation combo should result in a "brand new plug" (wich means that the pluga after you use it, should be like new, shiny, strigth, etc. etc)
Here are some tips about that:
Compression (shims). You know if the compression is ok or not by looking at the wire of the plug. If the wire is pushed inside, or bent (but still working), you are a little bit too compressed and need to add shims (0.05 or 0.1) When you are totally of (wich means that you have too much compression) your glowplug will explode (all metal parts of the glowplug in the ceiling of the piston and combustion chamber........no good

)
If on the other side the wire is pulled, you need to take some shims
A prefect compresiion is a straigth glowplug (like when is new)
Carburation:
You know about the carburation also reading the plug
Too wet, brown wire means is too rich.
Dull, not shiny wire means too lean
Again, brand new look means OK
Sorry for the poor explanation, i hope this can help
Paolo