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Engine Compression

Check compression at 300 RPM with engine warm, all spark plugs removed, and throttle wide open.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 9.0:1
Compression Pressure
Normal 178 psi (12.5 kg/cm2 )
Minimum 135 psi (9.5 kg/cm2 )
Maximum Variation Between Cylinders 28 psi (2.0 kg/cm2 )