Compression Check

Compression

Fully depress the accelerator pedal and crank the engine for 5 to 10 seconds.
Record the compression of the three combustion chambers and cranking speed.

Compression:
690 kPa (7.0 kgf/cm2, 100 psi)-250 rpm.
Differential limit between chambers:
150 kPa (1.5 kgf/cm2, 21 psi).
Differential limit of rotors:
98 kPa (1.0 kgf/cm2, 14 psi).





Cranking speed compensation
Compensate the compression according to the cranking speed.





Altitude compensation
Compensate the compression according to the altitude.

For detailed testing procedure see Compression Test. Testing and Inspection