9N compression

Hello guys!
I'm current fixing up a 1940 9N. Checked the compression and all cylinders were ~ 75 psi. I assume this would indicate a crap gauge and next step would be to try with another gauge? Isn't this supposed to be 90 psi or do I need to heat it all up and then test again? Any insight appreciated. I hope all cylinders didn't all deteriorate equally by some fluke..

Follow Ups:

• Re: 9N compression - Bob 15:01:33 05/05/23 (3)
  • Re: 9N compression - Tyler 15:47:39 05/05/23 (2)
    • Re: 9N compression - Bob 09:44:44 05/06/23 (0)
    • Re: 9N compression - Ed Gooding (VA) 20:16:45 05/05/23 (0)

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