What should the compression on a 1980 evinrude 150 be?

The compression on a 1980 Evinrude 150 should typically be in the range of 90 to 120 psi for each cylinder. It's important that the readings are relatively consistent across all cylinders, with no more than 10% variation between them. If the compression is significantly lower, it may indicate issues such as worn rings or a blown head gasket. Regular maintenance and checks can help ensure optimal performance.