Air Filter - Husqvarna ROTARY LAWN MOWER 917.38451 Owner's Manual

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 re-
move any oil trapped inside of engine.
Container
4. Wipe off any spilled oil from lawn
mower or side of engine.
5. Slowly pour oil down the oil fi ll 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 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 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 every 100 hours of
operation or every season, whichever oc-
curs fi rst. Service air cleaner more often
under dusty conditions.
TO CLEAN AIR FILTER
1. Remove cover.
2. Carefully remove cartridge.
3. Clean by gently tapping on a fl at sur-
face. If very dirty, replace cartridge.
Cartridge Slot
Back plate
Cover
CAUTION: Petroleum 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.
4. Install cartridge, then replace cover.
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.
IN-LINE FUEL FILTER
The fuel fi lter should be replaced once
each season. If fuel fi lter becomes
clogged, ob struct ing fuel fl ow to car bu -
re tor, re place ment is re quired.
1. With engine cool, remove fi lter and
plug fuel line sec tions.
2. Place new fuel fi lter in position in fuel line
with arrow pointing towards carburetor.
3. Be sure there are no fuel line leaks
and clamps are properly positioned.
4. Immediately wipe up any spilled gasoline.
Clamp
Fuel
Filter
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 spark 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.
13
Clamp