Compression test is a futile effort as these little Kohlers have a compression release that kicks in about 1/2 way through the compression cycle under low revs present when cranking.
Remove the spark plug and hold your finger on the port and you will tell if it has compression, and you can also hear it as well.
You will need a couple new gaskets for the breather ass'y to set the valve lash as well as a feeler gage set.
Any small engine shop should have these gaskets in stock
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