Honda EB3500X Owner's Manual page 31

d. Drain the carburetor by loosening the drain screw. Drain the gasoline
into a suitable container.
3. Change the engine oil.
4. Remove the spark plug and pour about a tablespoon of clean engine oil
into the cylinder. Crank the engine several revolutions to distribute the
oil, then reinstall the spark plug.
5. Pull the starter rope slowly until resistance is felt. Continue pulling until
the notch on the starter pulley aligns with the hole on the recoil starter
(see illustration below). At this point, the intake and exhaust valves are
closed, and this will help to protect the engine from internal corrosion.
Align the notch on the starter pulley
with the hole at the top of recoil starter.
6. Cover the engine to keep out dust.
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