Craftsman 917378421 gas walk-behind lawn mower

User Manual - Page 12

For 917378421.

PDF File Manual, 44 pages, Download pdf file

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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 gdnding wheel. Do not attempt
to sharpen while on the mower.
To check blade balance, drive a nail
intoa beam or wall. Leave about one
inch ofthe 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.
GRASS CATCHER
The grass catcher may be hosed with
water, but must be dry when used.
Check your grass catcher often for
damage or detedoration. 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.
DRIVE WHEELS
Check front drive wheels each time
before you mow to be sure they move
freely.
The wheels not turning freely means
trash, grass cuttings,etc. are inthe ddve
wheel area and must be cleaned to free
ddve wheels.
If necessary to clean the ddve wheels,
check both front wheels.
1. Remove hubcaps, hairpincotters and
washers.
2. Remove wheels from wheel adjusters.
3. Remove any trash or grass cuttings
from inside the dust cover, pinion and/
or ddve wheel gear teeth.
4. Put wheels back in place.
NOTE: If after cleaning, the drive wheels
do notturn freely,contact a Sears or other
qualified service center.
GEAR CASE
To keep your drive system working
properly, the gear case and area
around the drive should be kept clean
and free oftrash build-up. Clean under
the drive cover twice a season.
The gear case is filledwith lubricantto
the proper level at the factory. The only
time the lubricantneeds attention isif
service has been performed on the
gear case.
If lubricant is required, use onlyTexaco
Starplax Premium 1 Grease, Part No.
750369. Do not subst'dute.
ENGINE
LUBRICATION
Use only high quality detergent oil rated
with API service classificationSF-SJ.
Select the oil'sSAE viscositygrade
according to your expected operating
temperature.
NOTE: Although multi-viscosityoils
(5W30, 10W30 etc.) improve starting in
cold weather, these multi-viscosity oils
will result in increased oil consumption
when used above 32°R Check your
engine oil level more frequentlyto avoid
possible engine damage from running
low on oil.
Change the oil after every 25 hours of
operation or at least once a year ifthe
lawn mower is not used for 25 hours in
one year.
Check the crankcasealllevelbefore
startingtheengineand aftereach five(5)
hours of continuous use.Tighten oil plug
securely each time you check the oil
level.
12
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