Rotax 912ULS Cylinder Num 3
in 912 / 914 Technical Questions
10 years ago
I have a Rotax 912ULS bearing serial number is 5651792.
And I have a small issue with cylinder number 3 the spark plugs are white.. basically like new, the engine idles and runs smooth, however when removing all the plugs on cylinders 1,2 and 4 these are all in black colour exactly like the below photo. (And I think this is how they should all look right?) considering that this has been on idle for more than 3 to 4 minutes.
While number 3 Cylinder spark plug looks new!! photo below!!
I have noticed this issue while changing the oil and plugs filters etc.. on the newly purchased aircraft, the said aircraft has 680 hrs on it.
I did try to search the net and I did read that normally cylinder num 3 plug reading is different from the others but in my opinion its too much..
Your urgent attention is much appreciated.
BR
Michael
And I have a small issue with cylinder number 3 the spark plugs are white.. basically like new, the engine idles and runs smooth, however when removing all the plugs on cylinders 1,2 and 4 these are all in black colour exactly like the below photo. (And I think this is how they should all look right?) considering that this has been on idle for more than 3 to 4 minutes.
While number 3 Cylinder spark plug looks new!! photo below!!
I have noticed this issue while changing the oil and plugs filters etc.. on the newly purchased aircraft, the said aircraft has 680 hrs on it.
I did try to search the net and I did read that normally cylinder num 3 plug reading is different from the others but in my opinion its too much..
Your urgent attention is much appreciated.
BR
Michael
912ULSplugs.jpg (You do not have access to download this file.)
Cylinders1.pdf (You do not have access to download this file.)
