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6.2 TROUBLESHOOTING
Low or unstable compression
Worn cylinder or piston rings.
Overheating
Excessive carbon build-up on piston or combustion chamber wall.
Knocking or abnormal noise
Worn piston and cylinder.
Excessive carbon build-up.
Excessive smoke
Worn cylinder, piston, or piston rings.
Improper installation of piston rings
Scored or scratched piston or cylinder wall.
Damaged valve stem seal.