Fog through the spark plug hole for storage

Fogging through the spark plug hole is more effective for storage because it puts oil exactly where rust starts — on the cylinder wall and piston rings.

Running fogging oil through the carburetor while the saw is running works, but it has to compete with combustion. A lot of it burns off, and what’s left may not leave a consistent film on the cylinder bore. On a 2-stroke, the fuel already carries oil, so the carb-fogging method is more about coating the intake path than protecting the cylinder.

The spark plug hole route is direct: pull the plug, spray a few seconds of fogging oil into the cylinder, then pull the starter rope slowly a few times to spread it around. That leaves a real protective layer on the metal surfaces that sit all winter. It’s also the method most manufacturers recommend for long-term storage.

You can still run fogging oil through the carb if you want to protect the carburetor internals, but for the engine itself, the plug hole is the one that matters.

Your saw will be a lot happier in the spring.