Craftsman 917.387206 Owner's Manual page 10

3.5 horsepower 20" side discharge rotary lawn mower
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IMPORTANT:
Blade bolt is grade 8 heat
treated.
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 blade
is balanced.
Blade
adapter
Crankshaft
ke
Blade Key_
Blade
1
bolt
Lock-
Hardened
washer
washer
Trailing
edge
Crank-
shaft
Blade
adapter
GRASS CATCHER
( If purchased
as an accessory)
• 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, SG orSH.
Select
the oil's SAE viscosity grade according to your
expected
operating temperature.
10
NOTE:
Although multi-viscosity oils (5W30,
10W30 etc.) improve starting in cold weather,
these multi-viscosity oils will result in in-
creased 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. "13ghtenoil plug securely
each time you check the oil level.
TO CHANGE ENGINE OIL
• Disconnect
spark plug wire from spark
plug and place wire where
it cannot
come in contact
with spark plug.
• Be sure lawn mower is on level surface.
• Oil will drain more freely when warm.
• Catch oil in a suitable
container.
• Remove
bottom
oil drain plug.
• After oil has drained
completely,
replace
oil drain plug and tighten
securely.
• Refill engine with oil.
Pour slowly.
Do
not over fill.
• Fill to top of slot inside of filler hole.
• Reconnect
spark plug wire to spark
plug.
AIR FILTER
Your engine
will not run properly and may
be damaged
by using a dirty air filter.
Replace
the air filter every year, more
often if you mow in very dusty, dirty
conditions.
Do not wash air filter.
TO CHANGE
AIR FILTER
• Remove
the air filter by turning
counter-
clockwise
to the stop and pull away
from collar.

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