Murray 20-inch Push - Manual (Page 17)

MAINTENANCE
17 F-050406L
ENGINE MAINTENANCE
Use the following maintenance section to keep
your unit in good operating condition. All the
maintenance information for the engine is in
the ”Engine Instruction Book”. Before you start
the engine, read this book.
WARNING: Before you make an
inspection, adjustment (except
carburetor), or repair, discon-
nect the wire from the spark plug.
ENGINE TIPPING
When you service the engine, inspect the
blade, or clean the underside of the mower
housing; make sure to always tip the engine
with the spark plug up (see Figure 12). Trans-
porting or tipping the engine with the spark
plug down will cause:
S Hard starting.
S Engine smoking.
S Spark plug fouling.
S Oil or gas saturation of the air filter.
Figure 12
LUBRICATION
1. For maximum performance, lubricate the
wheels and all pivot points with engine oil
every 25 hours.
2. To lubricate the engine, refer to the ”Engine
Instruction Book”.
NOTE: Do not lubricate the engine stop
cable. Lubricants will damage the cable
and prevent the cable from moving freely.
Replace the cable if bent or damaged.
HOW TO CLEAN
THE MOWER HOUSING
WARNING: The blade will rotate
when the engine runs. Before
you clean the mower housing,
stop the engine and disconnect the wire
from the spark plug.
Grass and other debris can keep the mower
from working correctly. After you mow, clean
the mower housing as follows.
1. Stop the engine.
2. Disconnect the wire from the spark plug.
3. Clean dirt and debris from the top and the
bottom of the mower housing. Clean with
soap and water. Wipe off excess water be-
fore storage.
HOW TO ADJUST
THE HEIGHT OF CUT
WARNING: The blade will rotate
when the engine runs. Before
you change the height of cut,
disconnect the wire to the spark plug.
Models With Axle Bolts
To change the height of cut, move the axle bolt
at each wheel. Make sure you assemble each
axle bolt in the same hole position so that the
mower will cut level.
1. Hold the flange nut with a wrench. Use
another wrench and loosen the axle bolt.
2. Remove the flange nut (Figure 13).
3. Move the wheel and axle bolt to another
position.
4. Assemble the flange nut on the axle bolt.
Tighten the axle bolt. Do not turn the
flange nut.
Figure 13
Axle Bolt
Washer
Wheel
Flange
Nut