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Home >> Merkur >> 1987 >> XR4Ti Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - 4-CYL >> Testing >> Engine Compression
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Engine Compression

Check compression with engine warm, all spark plugs removed and throttle wide open. Crank engine at least 5 strokes per cylinder to determine engine compression.

NOTE: Connect coil high tension wire to ground before cranking engine for compression test.
COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 8.0:1
Max. Variation Between Cylinders 25%
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