Put a new carb on it and throw away the old crap gas. Forget the stabil, if the gas is so old that you need to think of that then you need new fuel. Only use fresh non-ethanol and never 87 octane. I have a source in town of 93 octane non-ethanol, it solved my two stroke problems.
When you put up the saw drain the tank and run it til it quits. If you’re going to store fuel then use the metal cans the pre-mix stuff comes in, don’t store it in plastic. Any fuel more than a couple months old should be dumped.
Crap fuel is the death of small engines.
