Yanmar 4TNV98 Service Manual page 239

Standard Compression Pressure (Reference Value)
Compression Pressure
Engine Model Deviation Between
at 250 rpm (250 min-1)
Cylinders
Standard Limit
483 - 513 psi 384 - 414 psi 29 - 43 psi
4TNV98
(3.33 - 3.53 MPa; (2.65 - 2.85 MPa; (0.2 - 0.3 MPa;
34 - 36 kgf/cm²) 27 - 29 kgf/cm²) 2 – 3 kgf/cm²)
Engine Speed and Compression Pressure (Use for Reference)
Figure 14-2
4TNV98 & 4TNE98 Diesel Engine Section 8. Troubleshooting
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