CCKB compression check

[JimS]

I tried to do a compression check on my 4041 today and got different readings depending on how I did it. What is the right procedure to use? What is normal compression for a CCKB?

[StanD]

Not possitive but 90-120 will still develop good power. Compression should be checked with wide open throttle. StanD

[D-17_Dave]

When you crank over the engine and see the guage start up you'll stop cranking when the needle stops increaseing at a reasonable rate. You can keep cranking on it and increase it by a few pounds each time but that's stretching the reading out.