Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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The bad gas has very likely caused part of our problem. If gas is not stabilized, it will start to turn stale within 45 days, from the date of purchase. Stale gas will turn to gum and varnish, and eventually clog the small jets and fuel passages inside the body of your carburetor.
Next problem: If your flywheel is not turning freely after you hooked up your jumper cables, either your starter could be bad, or your valves could be out of adjustment.
Let's try something. Remove your spark plug, then turn your key, to see if your engine will spin freely.
You and I can continue from here. Thanks again!