Craftsman 247.77099 Service Spark Plug, To Drain Oil, Service Air Cleaner, Service Muffler

• Change engine oil after the first five hours of	SERVICE SPARK PLUG
operation, and every twenty-five hours thereafter.	• Clean the spark plug and reset the gap to.030" at
TO DRAIN OIL	least once a season or every 50 hours of
	operation. See Figure 15. Spark plug
Drain oil while engine is warm. Follow the instructions	replacement is recommended at the start of each
given below:	season. Refer to engine parts list for correct
• Drain the fuel from the tank by running the engine	spark plug type.
until the fuel tank is empty.	NOTE: Do not sandblast spark plug. Spark plug
• Remove oil fill dipstick.	should be cleaned by scraping or wire brushing and
• Tip unit on its side to drain through the oil fill tube.
	washing with a commercial solvent.
• When engine is drained of all oil, refill with
approximately 18 oz. of fresh oil. Refer to Gas	.030" Gap Gauge
And Oil Fill-upin 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	Spark Plug
engine and is important to engine life and
performance. The air cleaner consists of a pleated	Figure 15
filter. Never run the engine without an air cleaner
completely assembled.	SERVICE MUFFLER
To Service Air Cleaner:
	• Inspect muffler periodically, and replace if
• Loosen screw and tilt plastic housing cover on
	necessary.
side of engine down. See Figure 14.
	• If your engine is equipped with a spark arrester
• Remove pleated filter from plastic housing cover
	screen assembly, remove after every 50 hours of
and replace with clean or new filter.
	use for cleaning and inspection. Replace if
• Tilt cover up into place and tighten screw.
	damaged.
	WARNING: Do not operate the Yard
	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
Air Cleaner	cloth or brush.
	• Frequently remove grass clippings, dirt, and
Housing
	debris from cooling fins, air intake screen, levers,
Figure 14	and linkage. This will help ensure adequate
	cooling and engine speed.

NOTE: If the filter is torn or damaged in any way, replace it.

WARNING: Temperature of muffler and nearby areas may exceed 150o F (65oC). Avoid these areas.

14