Cleaning, AIR Filter, Muffler, Spark Plug | Husqvarna 7021R specification

MAINTENANCE

LUBRICATION

Use only high quality detergent oil rated with API service classiﬁ cation SG–SL. Select the oil's SAE viscosity grade according to your expected operating temperature.

7.Continue adding small amounts of oil and rechecking the dipstick until it reads full. DO NOT overﬁ ll, or engine will smoke on startup.

8.Always be sure retighten dipstick before starting engine.

9.Reconnect spark plug wire to spark plug.

NOTE: Multi-viscosity oils (5W30, 10W30 etc.) improve starting in cold weather, and you should check your engine oil level frequently to avoid possible engine damage from running low on oil.

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 ﬁ ve (5) hours of continuous use. Tighten oil plug securely each time you check the oil level.

TO CHANGE ENGINE OIL (See Figs. 15 & 16)

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.

CONTAINER

FIG. 15

4.Wipe off any spilled oil from mower or side of engine.

5.Fill engine with oil. The engine oil capacity is 18.5 oz. If oil is not completely drained from engine, you may not need the entire container of a 20 oz. bottle of oil. Slowly pour 3/4 of the oil from the container down the oil ﬁ ll spout into the engine.

6.Wait one minute to allow oil to settle. Use guage on oil ﬁ ll cap/dipstick for checking level. Insert dipstick into the tube and rest the oil ﬁ ll cap on the tube. DO NOT thread the cap into the tube when taking reading.

OIL FILL CAP /

DIPSTICK

UPPER

MARK

LOWER

MARK

FIG. 16

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 occurs ﬁ rst. Service air cleaner more often under dusty conditions. See the maintenance section of your engine manual.

MUFFLER

Inspect and replace corroded mufﬂ er as it could create a ﬁ re 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 “PRODUCT SPECIFICATIONS” 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 / wheels free of gasoline, oil, etc.

•We do not recommend using a garden hose to clean lawn mower unless the electrical system, mufﬂ er, air ﬁ lter 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- derside of cover with putty knife or similar tool to remove any

12build-up of trash or grass on underside of drive cover.