Posted by Ortis on November 08, 2011 at 10:22:33 from (12.32.14.200):
I have seen several threads on this topic, but so far none have solved my problem. I parked my 1960s, square sheet metal Cub a year ago, and it was running well. In January, it would not start. I tried ether - not even a pop. So I figured it was ignition. I pulled a plug and the spark seemed fine, but I changed the points, rotor, coil, plugs, and even the wires. No help. I rebuilt the carb - no help. I checked timing - it's perfect. I even laid the plugs on the head and cranked with my finger over each plug hole in-turn. In eash case, a nice spark jumped at the correct plug about the time my finger was blown off. Compression? About 75 pounds - same as when I checked it 5 years ago. I though that maybe the exhaust or intake paths were blocked (stink bug epidemic). I have the exhaust pipe disconnected, and removed the manifold. Perfectly clear. I pulled the cylinder head - everythings look like it should. I will check valve clearance since I have it apart, but since compression is good, I am not expecting to find anything.
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