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Dale
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    Need more info Beno!   What are you working on?  Has the motor been setting a long time?  If two cylinders are 100 and one is 75 that not so bad.  If two are 75 and the other is 50 that’s not so good!   Compression usually changes once a motor comes up to temperature a couple times.  Motors that have been setting a long time compression don’t mean diddly!  JMHO

    dale