Gravely 992261 Owner's/Operator's Manual page 40

Add Fuel Stabilizer
1. Turn the fuel valve off while engine is
running and allow the engine to run until
it stops. Turn engine OFF when it begins
surging to avoid engine damage.
2. Add fuel stabilizer, following the
manufacturer's instructions.
3. Turn fuel valve on after adding fuel
stabilizer.
4. Re-start engine.
5. Run the engine outdoors for 1 minute to
be sure that treated gasoline has
replaced the untreated gasoline in the
carburetor.
6. Slow the engine to an idle speed.
7. Repeat step 1.
To Take the Unit Out of Storage
1. Refer to the engine service manual to
prepare the engine for service.
2. Put fresh, clean fuel in the fuel tank.
3. Begin the maintenance schedule.
4. Charge and install the battery.
EN - 40