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Home >> Mercury >> 1977 >> Capri II Base, 2.8L Eng, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Tune-Up Procedures - 6-Cylinder >> Engine Compression
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Engine Compression

Check compression pressure with battery fully charged and engine at normal operating temperature. Remove all spark plugs and set carburetor throttle plates in wide open position. Crank engine at least 5 compression strokes and note highest reading cylinder. Lowest reading cylinder must be at least 75% of highest reading cylinder.

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