To Drain Oil; Service Spark Plug; Service Air Cleaner; Service Muffler - Craftsman 247.770990 Manual Del Operador

• Change engine oil after the first five hours of
operation, and every twenty-five hours thereafter.

TO DRAIN OIL

Drain oil while engine is warm. Follow the instructions
given below:
• Drain the fuel from the tank by running the engine
until the fuel tank is empty.
• Remove oil fill dipstick.
• Tip unit on its side to drain through the oil fill tube.
• When engine is drained of all oil, refill with
approximately 18 oz. of fresh oil. Refer to Gas
And Oil Fill-up in OPERATION section.
• Replace oil fill dipstick and tighten.

SERVICE AIR CLEANER

The air cleaner prevents damaging dirt, dust, etc.,
from entering the carburetor and being forced into the
engine and is important to engine life and
performance. The air cleaner consists of a pleated
filter. Never run the engine without an air cleaner
completely assembled.
To Service Air Cleaner:
• Loosen screw and tilt plastic housing cover on
side of engine down. See Figure 14.
• Remove pleated filter from plastic housing cover
and replace with clean or new filter.
• Tilt cover up into place and tighten screw.
Figure 14
NOTE:
If the filter is torn or damaged in any way,
replace it.
WARNING:
and nearby areas may exceed 150
o
(65 C). Avoid these areas.
Air Cleaner
Housing
Temperature of muffler

SERVICE SPARK PLUG

• Clean the spark plug and reset the gap to.030" at
least once a season or every 50 hours of
operation. See Figure 15. Spark plug
replacement is recommended at the start of each
season. Refer to engine parts list for correct
spark plug type.
NOTE:
Do not sandblast spark plug. Spark plug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.

SERVICE MUFFLER

• Inspect muffler periodically, and replace if
necessary.
• If your engine is equipped with a spark arrester
screen assembly, remove after every 50 hours of
use for cleaning and inspection. Replace if
damaged.
WARNING:
Vacuum without a muffler or tamper with
the exhaust system. Damaged mufflers
or spark arresters could create a fire
hazard.

CLEAN ENGINE

• Clean engine by removing dirt and debris with a
cloth or brush.
• Frequently remove grass clippings, dirt, and
debris from cooling fins, air intake screen, levers,
and linkage. This will help ensure adequate
cooling and engine speed.
o
F
14
.030" Gap Gauge
Spark Plug
Figure 15
Do not operate the Yard