I've got my first engine here and when I flip the prop to start it I can hear a FFFFFP sound during the compression. I have gotten it started several times for testing, but only about 1/2 the times I've tried with a chicken stick.
Is it normal for a ringed engine to let the compression leak if you are flipping the prop slow to get it right up to the compression point? I have checked the head and crankcase bolts to make sure they are tight.