Husqvarna XT721F Owner'S Manual Download Page 14

14

STORAGE

ENGINE

FUEL SYSTEM

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. 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 carburetor 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.

ENGINE OIL

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

CYLINDER

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.

OTHER

•      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.

CAUTION:  Never store the lawn mower 
with gasoline in the tank inside a build-
 ing where fumes may reach an open 
fl ame or spark.  Allow the engine to cool 
before storing in any enclosure.

Immediately prepare your lawn mower for storage at the end of the season or if the unit will not be used for 30 days or more. 

SQUEEZE

TO ADJUST

FIG. 20

LOWER HANDLE

LAWN MOWER

When lawn mower is to be stored for a period of time, clean 
it thoroughly, remove all dirt, grease, leaves, etc.  Store in 
a clean, dry area.

1.    Clean  entire  lawn  mower  (See  “CLEANING”  in  the 

Maintenance section of this manual).

2.    Lubricate as shown in Maintenance section of this manual.

3.   Be sure that all nuts, bolts, screws, and pins are se-

curely fastened.  Inspect   moving parts for damage, 
breakage and wear.  Replace if necessary.

4.   Touch up all rusted or chipped paint surfaces; sand 

lightly before painting.

HANDLE (See Figs. 20 and 21)

You can fold your lawn mower handle for storage.

1.    Squeeze the bottom ends of the lower handle toward 

each other until the lower handle clears the handle 
bracket, then move handle forward.

2.    Loosen upper handle mounting bolts enough to allow 

upper handle to be folded back.

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

•         When setting up your handle from the storage position, 

lower han dle will automatically lock into mow ing position. 

FIG. 21

MOWING

POSITION

OPERATOR 
PRES ENCE
CONTROL BAR

      FOLD
  FORWARD
    FOR
STORAGE

LOWER 

HANDLE

HANDLE 

KNOB

UPPER 

HANDLE  

Summary of Contents for XT721F

Page 1: ...XT721F Owner s Manual 96143006200 2009 12 532 43 10 10 12 03 09 BY Printed in U S A ...

Page 2: ...vices in place See manufacturer s instructions for proper operation and installation of accessories Only use accessories approved by the manufacturer Stop the blade s when crossing gravel drives walks or roads Stop the engine motor whenever you leave the equip ment before cleaning the mower or unclogging the chute Shuttheengine motor offandwaituntilthebladecomes to complete stop before removing gr...

Page 3: ...aineropeningatalltimesuntilfuelingiscomplete Do not use a nozzle lock open device If fuel is spilled on clothing change clothing immedi ately Never overfill fuel tank Replace gas cap and tighten securely V GENERAL SERVICE Never run a machine inside a closed area Never make adjustments or repairs with the engine motor running Disconnect spark plug wire and keep wire away from plug to prevent accide...

Page 4: ...carton thor ougly for additional loose parts HOW TO SET UP YOUR LAWN MOWER TO UNFOLD HANDLE See Figs 1 and 2 IMPORTANT UNFOLD HANDLE CAREFULLY SO AS NOT TO PINCH OR DAMAGE CONTROL CABLES 1 Raise handles until lower handle section locks into place in mowing position 2 Remove protective padding raise upper handle sec tion into place on lower handle and tighten both handle knobs 3 Remove handle paddi...

Page 5: ...ENCE CONTROLBAR must be held down to the handle to start the engine Release to stop the engine STARTER HANDLE used for starting the engine HOUSING GRASS CATCHER DRIVE CONTROL LEVERS used to engage power pro pelled forward motion lawn mower MULCHER DOOR allows conversion to discharge or bagging operation OPERATOR PRESENCE CONTROL BAR STARTER HANDLE HANDLE KNOB These symbols may appear on your lawn ...

Page 6: ...age drive wheels To keep drive control engaged when turning corners push down on the handle to lift the front wheels off the ground while turning lawn mower The operation of any lawn mower can result in foreign objects thrown into the eyes which can result in severe eye damage Always wear safety glasses or eye shields while operating your lawn mower or performing any adjustments or repairs We reco...

Page 7: ...NE in the Mainte nance section of this manual CAUTION DO NOT overfill engine with oil or it will smoke heavily from the muffler on startup 1 Be sure lawnmower is level 2 Remove oil dipstick from oil fill spout 3 You receive a container of oil with the unit Slowly pour the entire container down the oil fill spout into the engine NOTE Initial oil fill requires only 18 oz due to residual oil in engin...

Page 8: ...essary to raise the height of cut to reduce pushing effort and to keep from overloading the engine and leaving clumps of grass clippings It may also be necessary to reduce ground speed and or run the lawn mower over the area a second time For extremely heavy cutting reduce the width of cut by overlapping previously cut path and mow slowly For better grass bagging and most cutting conditions the en...

Page 9: ...abuse or negligence To receivefullvaluefromthewarranty operatormustmaintain mower as instructed in this manual Some adjustments will need to be made periodically to properly maintain your unit At least once a season check to see if you should make any of the adjustments described in the Service and Ad justments section of this manual At least once a year replace the spark plug clean or replace air...

Page 10: ...E Protect your hands with gloves and or wrap blade with heavy cloth 4 Remove blade bolt by turning counter clockwise 5 Removebladeandattachinghardware bolt lockwasher and hardened washer NOTE Removethebladeadapterandcheckthekeyinside hub of blade adapter The key must be in good condition to work properly Replace adapter if damaged TO REPLACE BLADE See Fig 11 1 Positionthebladeadapterontheenginecra...

Page 11: ...ten under dusty conditions TO CLEAN AIR FILTER 1 Remove cover 2 Carefully remove cartridge 3 Clean by gently tapping on a flat surface If very dirty replace cartridge CAUTION Petroleumsolvents suchas kerosene are not to be used to clean cartridge Theymaycausedeterioration of the cartridge Do not oil cartridge Do not use pressurized air to clean or dry cartridge 4 Install cartridge then replace cov...

Page 12: ...jury before performing any service or adjustments 1 Release control bar and stop engine 2 Makesurethebladeandallmovingparts have completely stopped 3 Disconnect spark plug wire from spark plug and place where it cannot come in contact with plug IN LINE FUEL FILTER See Fig 15 The fuel filter should be replaced once each season If fuel filter becomes clogged obstructing fuel flow to carburetor repla...

Page 13: ...LACE DRIVE BELT See Fig 17 1 Place new drive belt on engine pulley inside belt re tainer 2 Route the other end of the new drive belt through hole in housing 3 Reinstall blade 4 Return mower to upright position 5 Install new belt on gearcase pulley 6 Reinstall belt keeper and drive cover NOTE Always use factory approved belt to assure proper fit and long life TO ADJUST HANDLE See Figs 18 and 19 The...

Page 14: ...on from dust and dirt Cover your unit with a suitable protective cover that does not retain moisture Do not use plastic Plastic cannotbreathe whichallowscondensationtoformand will cause your unit to rust IMPORTANT NEVER COVER MOWER WHILE ENGINE AND EXHAUST AREAS ARE STILL WARM CAUTION Never store the lawn mower with gasoline in the tank inside a build ing where fumes may reach an open flameorspark...

Page 15: ...ven 2 Wheel heights uneven 2 Set all wheels at same height 3 Buildup of grass leaves and trash under 3 Clean underside of mower housing mower Excessive 1 Worn bent or loose blade 1 Replace blade Tighten blade bolt vibration 2 Bent engine crankshaft 2 Contact a qualified service center Starter rope 1 Engine flywheel brake is on when control 1 Depress control bar to upper handle before hard to pull ...

Page 16: ...has received a separate warranty with product at time of purchase SECTION 2 HUSQVARNA S OBLIGATIONS UNDER THE WARRANTY Husqvarna will repair or replace defective components without charge for parts or labor if a component fails because of a defect in material or workmanship during the warranty period SECTION 3 ITEMS NOT COVERED BY THIS WARRANTY The following items are not covered by this warranty ...

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