Technical Specification

Technical Specifications & Standards 

1. On high compression engines (150 pounds and higher) pressure should not vary more than 15 pounds from the highest to the lowest cylinder.

2. On low compression engines (under 150 pounds) the pressure should not vary more than 10 pounds from the highest to the lowest cylinder.

3. Compression readings are unbalanced when one or two cylinders are considerably higher or lower than the others