Husqvarna 55C21HV 用户手册

IMPORTANT:  IT IS IMPORTANT TO PREVENT GUM DEPOSITS 
FROM FORMING IN ESSENTIAL FUEL SYSTEM PARTS SUCH 
AS CARBURETOR, FUEL FILTER, FUEL HOSE, OR TANK 
DURING STORAGE.  ALSO, ALCOHOL BLENDED FUELS 
(CALLED GASOHOL OR USING ETHANOL OR METHANOL) 
CAN ATTRACT MOISTURE WHICH LEADS TO SEPARATION 
AND FORMATION OF ACIDS DURING STORAGE.  ACIDIC GAS 
CAN DAMAGE THE FUEL SYSTEM OF AN ENGINE WHILE IN 
STORAGE.

•      Empty the fuel tank by starting the engine and letting 

it run until the fuel lines and car bu re tor are empty.

•         Never use engine or carburetor cleaner products in the 

fuel tank or permanent damage may occur.

•      Use fresh fuel next season.

NOTE:  Fuel stabilizer is an acceptable alternative in mini-
mizing the formation of fuel gum deposits during stor age.  
Add stabilizer to gasoline in fuel tank or storage container.  
Always follow the mix ratio found on stabilizer container.  
Run engine at least 10 minutes after adding stabilizer to 
allow the stabilizer to reach the carburetor.  Do not empty 
the gas tank and carburetor if using fuel stabilizer.

Drain oil (with engine warm) and replace with clean en-
gine oil.  (See “ENGINE” in the Maintenance section of 
this manual).

1.    Remove spark plug.

2.    Pour one ounce (29 ml) of oil through spark plug hole 

into cylinder.

3.    Pull starter handle slowly a few times to distribute oil.

4.    Replace with new spark plug.

•      Do not store gasoline from one season to another.

•     Replace your gasoline can if your can starts to rust.  

Rust and/or dirt in your gasoline will cause problems.

•      If possible, store your unit indoors and cover it to give 

protection from dust and dirt.

•     Cover your unit with a suitable protective cover that 

does not  retain moisture.  Do not use plastic.  Plastic 
cannot breathe, which allows condensation to form and 
will cause your unit to rust.

IMPORTANT:  NEVER COVER MOWER WHILE ENGINE AND 
EXHAUST AREAS ARE STILL WARM.

You can fold your lawn mower handle for storage.

NOTE: The upper handle has an “anti-fold” bracket located 
on the left side of the handle.  This bracket prevents the 
upper handle from folding forward, which helps protect 
control cable(s) from damage.

1.    Loosen the two (2) handle knobs on sides of the upper 

handle and allow handle to fold down to the rear.

2.    Remove the two (2) handle knobs and carriage bolts 

on sides of the lower handle and pivot entire handle 
as sem bly forward and allow it to rest on mower.

3.    Reinstall knobs and carriage bolts to lower handle or 

handle brackets for safe keeping.

•     When setting up your handle from the storage posi-

tion, you must manually lock lower handle into mowing 
position.

IMPORTANT:  WHEN FOLDING THE HANDLE FOR STORAGE 
OR TRANSPORTATION, BE SURE TO FOLD THE HANDLE AS 
SHOWN OR YOU MAY DAMAGE THE CONTROL CABLES.