Craftsman 316.77237 Operator's Manual page 10

BLADE REPLACEMENT
WARNING:
To avoid serious personal injury, always
wear gloves while han dling, removing or in stall ing the blade.
1. Place a 5/16" Allen
wrench in the spindle
hole (Fig. 19).
2. While holding the Allen
wrench in place, loosen
the nut with a 15/16"
wrench by turning it
counterclockwise (Fig. 19).
3. Re move the nut and
blade. Keep the nut for
new blade installation.
4. Install the new blade and
nut (Fig. 20).
5. While holding the Allen
wrench in the spindle hole,
tighten the nut by turning
the wrench clockwise until
tight (Fig. 21).
Edger Blade Nut
Fig. 20
NOTE: Make sure that the blade stays flat and centered against
the output shaft throughout installation.
WARNING:
Verify the blade is flat against the output
shaft after the nut is tightened. If the blade is off-cen ter,
the unit will be dam aged by vibration, and the blade may
fly off, which can cause serious personal in ju ry.
REPLACEMENT PARTS
Blade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 753-05562
Nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 753-05549
Use only Craftsman replacement parts.
CHECKING THE OIL LEVEL
The importance of checking and maintaining the proper oil level in the
crankcase cannot be overemphasized. Check oil before each use:
1. Stop the engine and allow oil to drain into the crankcase.
2. Place the unit on a level surface to get an accurate oil level
reading (Fig. 22).
3. Keep dirt, grass clippings and other debris out of the engine. Clean
the area around the oil fill plug before removing it.
4. Remove the oil fill plug.
10
MAINTENANCE AND REPAIR INSTRUCTIONS
Spindle Hole
Loosen
Fig. 19
Tighten
Fig. 21
Max Oil Fill Line
Fig. 22
5. Look into the oil fill hole, use a flashlight if needed. The oil should
be just touching the innermost thread (Fig. 22).
6. If the oil level is not touching the innermost thread on the oil fill
hole, add a small amount of oil to the oil fill hole and recheck
(Fig. 23). Repeat this procedure until the oil level reaches the
innermost thread on the oil fill hole.
NOTE: Do not overfill the unit.
NOTE: Make sure the O-ring is in place on the oil fill plug when
checking and changing the oil (Fig. 8).
CHANGING THE OIL
CAUTION:
Wear gloves to prevent injury when handling
the unit.
For a new engine, change the oil after the first 10 hours of operation.
Change the oil while the engine is still warm. The oil will flow freely
and carry away more impurities.
1. Unplug spark plug boot to
prevent accidental starting.
2. Remove the oil fill plug.
3. Pour the oil out of the oil fill
hole and into a container by
tipping the unit to a vertical
position (Fig. 24). Allow ample
time for complete drainage.
4. Wipe up any oil residue on the
unit and clean up any oil that
may have spilled. Dispose of
the oil according to Federal,
State and local regulations.
5. Refill the crankcase with 3.04
fluid ounce (90 ml or 3/8 cup)
of SAE 30 SF, SG, SH oil.
NOTE: Use the bottle and spout saved from initial use to measure the
correct amount of oil. The top of the label on the bottle measures
approximately 3.04 ounces (90 ml or 3/8 cup) (Fig. 23). Check the
level; See Checking the Oil Level. If the level is low, add a small
amount of oil and recheck. Do not overfill (Fig. 23).
6. Replace the oil fill plug.
7. Reconnect the spark plug boot.
AIR FILTER MAINTENANCE
Cleaning the Air Filter
WARNING:
To avoid serious personal injury, always
turn the unit off and allow it to cool before you clean or
service it.
Clean and re-oil the air filter every 10 hours of operation. It is an important
item to maintain. Failure to maintain your air filter properly can result in
poor performance or can cause permanent damage to your engine.
1. Open the air filter cover. Push the tab on the left side of the cover
in, then swing the air filter cover out and off of the air filter housing
(Fig. 25).
2. Remove the air filter and the screen that sits behind it (Fig. 25).
3. Wash the filter in detergent and water (Fig. 26). Rinse the filter
thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the filter (Fig. 27).
5. Squeeze the filter to spread and remove excess oil (Fig. 28).
6. Replace the filter (Fig. 25).
Fill Level
Fig. 23
Fig. 24