Craftsman 917.388721 User Manual

Page 12

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TO SHARPEN BLADE
NOTE: We do not recommend sharpen­
ing blade - but if you do, be sure the

blade is balanced.
Care should be taken to keep the blade
balanced. An unbalanced blade will

cause eventual damage to lawn mower
or engine.

• The blade can be sharpened 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 exposed. 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 biade

is balanced.

GRASSCATCHER

• The grass catcher may be hosed with

water, but must be dry when used.

• Check your grass catcher often for

damage or deterioration. Through
normal use it will wear. If catcher
needs replacing, replace only with a
manufacturer approved replacement
catcher. Give the lawn mower model

number when ordering.

ENGINE

LUBRICATION
Use only high quality detergent oil rated

with API service classification SF-SJ.

Select the oil's SAE viscosity grade
according to your expected operating
temperature.

SAE VISCOSITY GRADES

ay 32* -w

TEMPERATURE RAHG£

BEFORE NEXT OIL CHANGE

NOTE: Although multi-viscosity oils
(5W30, 10W30 etc.) improve starting in

cold weather, these multi-viscosity oils
will result in increased oil consumption
when used above 32°F. Check your

engine oil level more frequently to avoid
possible engine damage from running
low on oil.
Change the oil after every 25 hours of

operation or at least once a year if the

lawn mower is not used for 25 hours in
one year.

Check the crankcase oil level before
starting the engine and after each five (5)
hours of continuous use. Tighten oil plug
securely each time you check the oil

level.

TO CHANGE ENGINE OIL

NOTE: Before tipping lawn mower to
drain oil, drain fuel tank by running
engine until fuel tank is empty.

1. Disconnect spark plug wire from spark

plug and place wire where it cannot

come in contact with spark plug.

2. Remove engine oil cap; lay aside on a

clean surface.

3. Tip lawn mower on its side as shown

and drain oil into a suitable container.

Rock lawn mower back and forth to

remove any oil trapped inside of
engine.

4. Wipe off any spilled oil on lawn mower

and on side of engine.

5. Fill engine with oil. {See “ADD OIL” in

the Operation section of this manual).

6. Reconnect spark plug wire to spark

plug.

AIR FILTER

Your engine wiN not run properly and may
be damaged by using a dirty air filter.
Replace the air filter every 100 hours of
operation or every season, more often if
you mow in very dusty, dirty condiOons.

TO CLEAN AIR FILTER

1. Loosen screw and tilt cover to remove.
2. Carefully remove cartridge.
3. Clean by gently tapping on a flat

surface. If very dirty, replace cartridge.

^CAUTION; Petroleum solvents, such as

kerosene, are not to be used to clean
cartridge. They may cause deterioration of
the catiridge. Do not oii cartridge. Do not
use pressurized air to clean or dry
cartridge.

4. Instali cartridge, then replace cover

making sure the tabs are aligned with
the slots in the back plate. Fasten

screw securely.

12

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