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What is Black Spots on Cylinder Liners Explained about?

Black deposits, primarily calcium sulphate, can form on the cylinder liners of 2-stroke engines, particularly in the mid-stroke area. These deposits result from the neutralization of condensated sulphuric acid by calcium carbonate from cylinder oil additives, and while they can appear black due to soot, they generally do not negatively impact engine performance. Proper maintenance, including managing liner wall temperature and avoiding water carry-over, can help prevent these deposits.

Author

Arun S

Language

EN