Spark plug calibration

The electrode is regulated as a factory but on many occasions it does not correspond to the data that comes in the owner's manual, therefore you have to check the calibration to see if it corresponds to manual, it always reveals to prevail what the manual is informing us, or the manual the manual is of adornment.

Montal the normal spark plugs they are already calibrated for a motor standard what you should see is that the four are more or less the same opening because sometimes they can be hit and the electrode closes, the average is the inches 0.45 approx and in millimeters 1.3 I think

I agree with short circuit, but it is then clear that if you have to check the calibration "just to be safe" and realize that in many cases there are differences with what the manual says, from experience I tell them.