Storage Time: 30 to 90 days
1. Add gasoline stabilizer to the fuel tank following the manufacturer’s instructions. When adding a gasoline stabilizer, fill the fuel tank with fresh gasoline. If only partially filled, air in the tank will promote fuel deterioration during storage.
Note:
• All stabilizers have a shelf life and their performance will deteriorate over time.
• Fuel stabilizers will not reconstitute stale fuel. Honda Fuel Stabilizer, 8 oz. PN 08732-0001
2. After adding a gasoline stabilizer, run the engine outdoors for 10 minutes to be sure the treated gasoline has replaced the untreated gasoline throughout the fuel system.
3. Stop the engine and turn the fuel valve to the OFF position.
4. Restart the engine and allow it to run until it runs out of gas. Running time should be less than 3 minutes.
Storage Time: More than 90 days (long term or seasonal storage)
Start the engine and allow it to run long enough to empty all the gasoline from the entire fuel system (including the fuel tank). Do not allow gasoline to remain in your lawn mower for more than 90 days of inactivity.
Stale fuel in your fuel container
If you have some fuel left in your storage container at the end of the season, the Environmental Protection Agency (EPA) recommends adding the gasoline to your car's gas tank (http://epa.gov/reg5oair/mobile/winter.html), provided your car’s fuel tank is fairly full.