Long Term Storage
Whenever the unit will not be used for 30 days or longer, use the following procedures to prepare it for storage:
nClean external parts thoroughly.
nDrain all the fuel from the fuel tank.
IMPORTANT!
All stored fuels should be stabilized with a fuel stabilizer such as 
oil with fuel stabilizer is not used.
CAUTION!
Gasoline stored in the carburetor for extended periods can cause hard starting and could also lead to increased service and maintenance cost.
nRemove the remaining fuel from the fuel lines and carburetor.
1.Prime the primer bulb until no more fuel is passing through.
2.Start and run the engine until it stops running.
3.Repeat steps 1 and 2 until the engine will no longer start.
nRemove the spark plug and pour about 1/4 ounce of
Slowly pull the recoil starter 2 or 3 times so oil will evenly coat the interior of the engine. Reinstall the spark plug.
nBefore storing the unit, repair or replace any worn or damaged parts.
nRemove the air cleaner element from the carburetor and clean it thoroughly with soap and water. Let dry and reassemble the element.
nStore the unit in a clean,
Blade Sharpening
When the cutting edges of the blade become dull, they can be resharpened with a few strokes of a file.
In order to keep the blade in balance, all cutting edges must be sharpened equally.
Shindaiwa Tornado™ Blade
To sharpen the cutters on a Shindaiwa Tornado™ Blade, use a
Round 
File 30°
Figure 31
WARNING!
Sharpen only the cutting teeth of a blade. DO NOT alter the contour of the blade in any way.
Multiple-tooth Circular Blade
Use a round file to maintain a radius of 0.04 to 0.06” (1 to 1.5 mm) at the base of each tooth. Cutting edges must be offset equally on each side.
Round
File
Figure 32
16