Husqvarna 5521BBC, Owner'S Manual

Page: 13 / 23

13
MAINTENANCE
TO CHANGE ENGINE OIL (See Figs. 17 & 18)
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 oil fill cap/dipstick; lay aside on a clean sur-
face.
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.
4. Wipe off any spilled oil from lawn mower or side of
engine.
AIR FILTER
Your engine will not run properly and may be damaged
by using a dirty air filter. Replace the air filter every 100
hours of operation or every season, whichever occurs first.
Ser vice air cleaner more often under dusty conditions. See
the main te nance section of your engine manual.
MUFFLER
Inspect and replace corroded muffler as it could create a
fire hazard and/or damage.
SPARK PLUG
Replace spark plug at the 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
“PROD UCT SPEC I FI CA TIONS” section of this manual.
CLEANING
IMPORTANT: FOR BEST PERFORMANCE, KEEP MOWER
HOUSING FREE OF BUILT-UP 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 finished surfaces and wheels free of 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
underside of cover with putty knife or similar tool to re-
move any build-up of trash or grass on underside of drive
FIG. 17
CONTAINER
OIL FILL
CAP /
DIPSTICK
LOWER
MARK
UPPER
MARK
FIG. 18
5. Fill engine with oil. Slowly pour oil down the oil fill
spout into the engine.
6. Wait one minute to allow oil to settle. Use guage on oil
fill cap/dipstick for checking level. Insert dipstick into
the tube and rest the oil fill cap on the tube. DO NOT
thread the cap into the tube when taking reading.
7. Continue adding small amounts of oil and recheck-
ing the dipstick until it reads full. DO NOT overfill, or
engine will smoke on startup.
8. Always be sure to retighten oil fill cap/dipstick before
starting engine.
9. Reconnect spark plug wire to spark plug.