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compression release malfunction on craftsman 24HP Twin?

I have Good fuel, good spark, both intake and exhaust valves function on both cylinders (I removed the valve covers and observed them),  I have good compression on RH cylinder, no compression on LH cylinder.  Engine will not start.  Ideas?

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No compression on LH cylinder sounds like major issue with that cylinder. Cylinder leakdown test may reveal if it is losing compression past valves or piston rings or head gasket. However, most DIYers don’t have a leakdown tester.

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Good compression on RH cylinder. None on LH cylinder. I can get a compression tester. Question: with a 2 cylinder and good compression on one cylinder and none in the other, wouldn't it still start? Just run really ragged?

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Harry Laclair will be eternally grateful.
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