breandan81
19.06.2021 19:09:08
It is necessary to perform the procedure carefully, cleaning and removing all dirt and sooting on the surface. Remember that washed and cleaned spark plugs operate 10. 15% more efficiently than dirty ones.
See full version: Why spark plugs are black
It is necessary to perform the procedure carefully, cleaning and removing all dirt and sooting on the surface. Remember that washed and cleaned spark plugs operate 10. 15% more efficiently than dirty ones.
If only one blackened spark plug has appeared in your car, you can detect the failure by changing the position of the spark plugs. If the new spark plug also turns black after that, and the old one becomes clean, it means that the problem is not in the spark plugs, but in the cylinder. If nothing has changed, the question then is the performance of the spark plug. more
In some cases, sooting that naturally appears in the combustion chamber can come off the piston and stick to the spark plug insulator at high engine speeds. The consequence of this is engine misfire. This is the most harmless situation, when spark plugs blacken. You can fix it by cleaning their surface or replacing them with new ones. [links]
As a rule, the following consequences occur in case of the set late ignition and operation on a rich air-fuel mixture: more
The cleaning procedure is performed according to the following algorithm:
The black sooting of the spark plugs can tell the car owner about the problems with his car. The causes of this can be low-quality fuel, problems with ignition, incompatibility of the air-fuel mixture or incorrectly set carburetor, and so on. All these problems can be diagnosed quite easily just by looking at the black spark plugs.
As a rule, the following consequences occur in case of the set late ignition and operation on a rich air-fuel mixture:
Now let’s consider the question of the causes of sooting on the spark plugs. There are 11 key reasons:
The cleaning procedure is performed according to the following algorithm:
Spark plugs should be cleaned and inspected regularly. It is recommended to do this in approximately 8. 10 thousand kilometers. It is very convenient to do this at the time of replacing the engine oil. However, if the above described signs have appeared, it can be done earlier. [links]
A sooty appearance suggest that it is running rich. here
Now, to the plug colour - what you are seeing is an indication of the mixture at the time you turned the motor off. If it was idling then this is what you would see, if it was under load at (say) 4000 rpm then that is what youe see - get the picture?
Took all 4 plugs out today and both of them on right side of engine are sooty (dry) black.. the two on the left are ok.
Maybe noobish to ask but if I dont ask il never know
My right hand exhaust is popping when engine is cold, if you put your hand against the right exhaust outlet you can feel it punching your hand and its quite audible, where as left outlet is smooth and constant. more
An expert whose answer got voted for 20 times. here
An expert who has written 50 answers of more than 400 characters.
Ok most likely cause for this is jetting (Carbi) and or the air / fuel mix screw set to rich - Well done for noticing though as no where near enough people read their spark plugs and make adjustments - they normally wait til bike don't work before researching?
Simplest and first option would be turn in your air/fuel mix screw quarter to half a turn in (clock wise) this leans the fuel mix slightly
Second option if still not helping from just screw adjustment is put the mix screw back to where it was before and change the pilot jet to a smaller size - the pilot jets have number stamped on them so once you have yours out look for the number and just buy new 1 or 2 sizes smaller (they only about $5 each) then of course go back to fine adjustments on your air/fuel mix screw to find the correct balance
You will very quickly know if your setting is to lean as result of adjustments as you will get back firing when rolling of the throttle if becomes to lean
jetting and air fuel mix adjustments can be annoying sometimes as you may need to go up a bit then down a bit then up again but take your time do very minor adjustments then check results and my tip is only ever change one thing at a time then record the change then test and record the result if you dont you will very quickly forget what you did, not know what to reverse if result was poor and if result was good you won't know exactly what made the improvement.
good luck mate regards Jamie