As was said,check the valve spring. An easier way to locate the leak in the cylinder is to put air in and listen for the hissing. It's like a compression test in reverse. In the compression tester,there's a Schrader valve that needs to be removed. It's like the valve in a tire valve stem. Remove it,screw the compression tester into the plug hole and hook it up to a compressor with regulated air flow. Awesome job girl. Who needs a manicure?? My wife is 58 and runs a woodsplitter and a straight shaft weed wacker. That's what I brag about..