Husqvarna 917.375940 Owner's Manual page 13

MAINTENANCE
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 (See Fig. 15)
NOTE: Before tipping lawn mower to drain oil, empty 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 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,
FIG. 15
4, Wipe off any spilled oil from lawn mower or side of
engine,
5, Slowly pour oil down the oil fill spout, stopping every
few ounces to check the oil level with the dipstick,
6, Stop adding oil when you reach the FULL mark on the
dipstick. Wait a minute to allow oil to settle,
7, Continue adding small amounts of oil, rechecking the
dipstick until oil level settles at FULL, DO NOT over-
fill, or engine will smoke heavily from the muffler on
startup,
8, Always be sure to retighten oil dipstick before starting
engine,
9, Reconnect spark plug wire to spark plug.
AIR FILTER (See Fig. 16)
Your engine will not run properly and may be damaged
by using a dirty air filter, Replace the air filter cartridge
every 100 hours of operation or every season, whichever
occurs first, Service air cleaner more often under dusty
conditions.
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,
4.
CAUTION: Petroleum solvents, such as
kerosene, are not to be used to clean
cartridge.They may cause deterioration
of the cartridge. Do not oil cartridge.
Do not use pressurized air to clean or
dry cartridge.
Install cartridge, then replace cover making sure the
tabs are aligned with the slots in the back plate, Fasten
screw securely.
BACK
LIP
COVER
CARTRIDGE COVER TABS
FIG. 16
MUFFLER
Inspect and replace corroded muffler as it could create a
fire hazard and/or damage,
SPARK PLUG
Replace spark plug atthe beginning of each mowing season
or after every 100 hours of operation, whichever occurs
first. Spark plug type and gap setting are shown in the
"PRODUCT SPECIFICATIONS" section of this manual.
CLEANING
IMPORTANT: FOR BEST PERFORMANCE, KEEP MOWER
HOUSING FREE OF BUILT-UPGRASS AND TRASH. CLEAN
THE UNDERSIDEOF YOUR MOWER AFTER EACH USE.
I & CAUTION: Disconnect spark plug wire I
from spark plug and place wire where it
cannot come in contact with plug,
• Clean the underside of your lawn mower by scraping
to remove build-up of grass and trash,
• Clean engine often to keep trash from accumulating, A
clogged engine runs hotter and shortens engine life,
• Keep finished surfaces and wheels free of all gasoline,
oil, etc,
• We do not recommend using a garden hose to clean
lawn mower unless the electrical system, muffler, air
filter and carburetor are covered to keep water out,
Water in engine can result in shortened engine life,
CLEAN UNDER DRIVE COVER
Clean under drive cover at least twice a season, Scrape un-
de rside of cove r with putty knife or similar tool to remove any
13 build-up of trash or grass on underside of drive cover,