Husqvarna 7021P / 961330030, Operator'S Manual

11

LAWN MOWER

Always observe safety rules when performing main te nance.

TIRES

•  Keep tires free of gasoline, oil, or insect control chem i-

 cals which can harm rubber.

•  Avoid stumps, stones, deep ruts, sharp objects and 

other hazards that may cause tire damage.

BLADE CARE

For best results, mower blade must be kept sharp.  Re place 

bent or dam aged blades.

CAUTION:  Use only a replacement 

blade approved by the manufacturer of 

your mower.  Using a blade not approved 

by the manufacturer of your mower is 

hazardous, could damage your mower 

and void your warranty.

TO REMOVE BLADE (See Fig. 12)
1.  Disconnect spark plug wire from spark plug and place 

wire where it cannot come in contact with plug.

2.  Turn lawn mower on its side. Make sure air filter and 

carburetor are up.

3.  Use a wood block between blade and mower hous ing 

to prevent blade from turning when re mov ing blade 

bolt.

NOTE:

  Protect your hands with gloves and/or wrap blade 

with heavy cloth.
4.  Remove blade screw by turning counter-clockwise. 
5. Remove 

blade.

NOTE

:  Remove the blade adapter and check the key inside 

hub of blade adapter. The key must be in good condition 

to work properly. Replace adapter if dam aged.
TO REPLACE BLADE (See Fig. 12)
1.  Position the blade adapter on the engine crank shaft. 

Be sure key in adapter and crankshaft key way are 

aligned.

2.  Position the blade on the blade adapter aligning the 

two (2) holes in the blade with the raised lugs on the 

adapter.

3.  Be sure the trailing edge of blade (opposite sharp 

edge) is up toward the engine.

4.  Install the blade screw into blade adapter and crank-

 shaft.

5.  Use block of wood between blade and lawn mower 

housing and tighten the blade bolt, turning clock wise.

•  The recommended tightening torque is 35–40 ft. lbs.   

(47–54 Nm).

IMPORTANT

:  BLADE SCREW IS HEAT TREATED.  IF SCREW 

NEEDS REPLACING, REPLACE ONLY WITH APPROVED SCREW.

TO SHARPEN BLADE

NOTE

:  We do not recommend sharp en ing blade - but if 

you do, be sure the blade is balanced.  An un bal anced 

blade will cause eventual damage to lawn mower or engine. 

MAINTENANCE

•  The blade can be sharp ened with a file or on a grinding 

wheel. Do not attempt to sharpen while on the mower.

•  To check blade balance, drive a nail into a beam or 

wall. Leave about one inch of the straight nail ex posed. 

Place center hole of blade over the head of the nail. 

If blade is balanced, it should remain in a horizontal 

position. If either end of the blade moves downward, 

sharpen the heavy end until the blade is balanced.

GRASS CATCHER

•  The grass catcher may be hosed with water, but must 

be dry when used.

•  Check your grass catcher often for damage or de te-

 ri o ra tion.  Through normal use it will wear.  If catcher 

needs replacing, replace only with ap proved replace-

ment catcher.  Give the mower model number when 

ordering.

ENGINE

Maintenance, re pair, or re place ment of the emission con trol 

de vic es and sys tems, which are be ing done at the cus tom-

 ers expense, may be performed by any non-road engine 

repair es tab lish ment or individual. Warranty repairs must 

be performed by an authorized engine man u fac tur er's 

service outlet.

LUBRICATION

Use only high quality detergent oil rated with API service 

classification SJ–SN. Select the oil's SAE viscosity grade 

according to your expected operating temperature.

NOTE:

  Multi-viscosity oils (5W30, 10W30 etc.) improve 

starting in cold weather, and you should check your engine 

oil level frequently to avoid possible engine damage from 

running low on oil.

FIG. 12

BLADE

SCREW

BLADE ADAPTER

KEY

BLADE

TRAILING EDGE

CRANKSHAFT

KEY WAY

CRANKSHAFT