1999 Volvo Penta "WT" Models Workshop Manual, Page 14Get this manual
It is recommended the following quick reference chart be used when checking cylinder compression pressuresThe chart has been calculated so that the lowest reading number is 75 of the highest reading Compression Pressure Limit Chart
MaxPSI MinPSI MaxPSI MinPSI MaxPSI MinPSI MaxPSI MinPSI
134 136 138 140 142 144 146 148 150 152
101 102 104 105 107 108 110 111 113 114
154 156 158 160 162 164 166 168 170 172
115 117 118 120 121 123 124 126 127 129
174 176 178 180 182 184 186 188 190 192
131 132 133 135 136 138 140 141 142 144
194 196 198 200 202 204 206 208 210 212