Husqvarna W21 Operator's Manual page 44

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
NOTE: Before tipping lawn mower to drain oil,
empty fuel tank by running engine until 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
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.
4. Wipe off any spilled oil from mower or
side of engine.
5. Replace engine oil cap.
The engine holds 0.90 qt.(0.85L)
6. Slowly pour oil down the oil fill spout,
stopping every few ounces to check the
oil level with the dipstick.
7. Stop adding oil when you reach the
FULL mark on the dipstick. Wait a
minute to allow oil to settle.
8. Continue adding small amounts of oil,
rechecking the dipstick until oil level
settles at FULL. DO NOT overfill, or
engine will smoke heavily from the
muffler on startup.
9. Always be sure to retighten oil dipstick
before starting engine.
10. Reconnect spark plug wire to spark plug.
42
-English
LUBRICATION
Oil Fill
The dipstick markings
WARNING!
Engine oil can be very hot if it is
drained directly after stopping
the engine. Allow the engine to
cool somewhat first.
1
1. Oil Fill
8009-159