Chosen Solution
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?
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.
