Husqvarna 917.37581 - Manual (Page 14)

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7. Continue adding small amounts of oil,
rechecking the dipstick until oil level
settles at FULL. DO NOT overfi ll, or
engine will smoke heavily from the muf-
fl er on startup.
8. Always be sure to retighten oil dipstick
before starting engine.
9. Re con nect spark plug wire to spark plug.
AIR FILTER
Your engine will not run properly and may
be damaged by using a dirty air fi lter.
Replace the air fi lter cartridge every 100
hours of op er a tion or every season, which-
ev er occurs fi rst. Service air cleaner more
often under dusty conditions.
4. Install cartridge, then replace cover.
Be sure tabs are aligned with slots in
the back plate. Fasten screw securely.
MUFFLER
Inspect and replace corroded muffl er as it
could create a fi re hazard and/or dam age.
SPARK PLUG
Replace spark plug at the beginning of
each mowing season or after every 100
hours of operation, whichever occurs
fi rst. Spark plug type and gap setting
are shown in the “PROD UCT SPEC I FI C-
A TIONS” section of this manual.
CLEANING
IMPORTANT: For best performance,
keep mower housing free of built-grass
and trash. Clean the underside of your
mower after each use.
CAUTION: Disconnect spark plug wire
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 fi nished surfaces and wheels free
of all gasoline, oil, etc.
• We do not recommend using a garden
hose to clean lawn mower unless the
elec tri cal system, muffl er, air fi lter and
carburetor are covered to keep water
out. Water in engine can result in short-
ened engine life.
CLEAN UNDER DRIVE COVER
Clean under drive cover at least twice a sea-
son. Scrape underside of cover with putty
knife or similar tool to remove any build-up
of trash or grass on underside of drive cover.
SERVICE AND ADJUSTMENTS
WARNING: To avoid serious injury, before performing any service and adjustments:
1. Release control bar and stop engine.
2. Make sure the blade and all moving parts have completely stopped.
3. Disconnect spark plug wire from spark plug and place wire where it cannot come in
contact with plug.
Back plate
Slot
Lip
Cover
tab
Cartridge
Cover
LAWN MOWER
TO ADJUST CUTTING HEIGHT
See “TO ADJUST CUTTING HEIGHT” in
the Operation sec tion of this manual.
REAR DEFLECTOR
The rear defl ector, attached between the
rear wheels of your mower, is provided to
minimize the possibility that objects will
be thrown out of the rear of the mower
into the operator mowing position. If the
defl ector becomes dam aged, it should be
replaced.
TO CLEAN AIR FILTER
1. Loosen screw and tilt cover to re move.
2. Carefully remove cartridge.
3. Clean by gently tapping on a fl at sur-
face. If very dirty, replace car tridge.
CAUTION: Pe tro leum solvents, such as
ker o sene, are not to be used to clean car-
tridge. They may cause de te ri o ra tion of the
cartridge. Do not oil car tridge. Do not use
pres sur ized air to clean or dry car tridge.