Service Spark Plug; Air Cooling System - Craftsman 580.676640 Owner's Manual

2. Carefully remove air cleaner assembly to prevent
debris from falling into carburetor.
3. Take air cleaner assembly apart and clean all
parts. Wash foam air cleaner in liquid detergent
and water. Squeeze dry in a clean cloth.
4. SATURATE foam air cleaner in engine oil and
squeeze in a clean cloth to remove excess oil.
5. Reinstall clean or new foam air cleaner in body.
6. Install air cleaner securely on carburetor with
screw.

Service Spark Plug

Service the spark plug every 100 hours of operation or
yearly, whichever occurs first.
WARNING
Unintentional sparking can result in fire or
electric shock.
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR
PRESSURE WASHER
• Disconnect the spark plug wire from the spark plug and
place the wire where it cannot contact spark plug.
WHEN TESTING FOR ENGINE SPARK
• Use approved spark plug tester.
• DO NOT check for spark with spark plug removed.
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Replace spark plug with recommended plug if
electrodes are worn or if insulator is cracked or
chipped.
4. Check electrode gap with wire feeler gauge and
set gap at 0.030 inches (0.76mm), if necessary.
5. Install spark plug, tighten securely.
Spark Arrester Service
Your engine is not factory-equipped with a spark
arrester. In some areas, it is illegal to operate an
engine without a spark arrester. Check local laws and
regulations. A spark arrester is available from your
nearest Sears service center. If you need to order a
spark arrester, contact your local Sears service center.
The spark arrester must be serviced every 50 hours to
keep it functioning as designed.
If the engine has been running, the muffler will be very
hot. Allow the muffler to cool before servicing spark
arrester.
WARNING
Running engines produce heat.
Temperature of muffler and nearby areas
can reach or exceed 150°F (65°C).
Severe burns can occur on contact.
Combustible debris, such as leaves, grass,
brush, etc. can catch fire.
• DO NOT touch hot surfaces.
• Allow equipment to cool before touching.
• The pressure washer must be at least 5 feet from
structures having combustible walls and/or other
combustible materials.
• Keep at least 3 feet of clearance on all sides of pressure
washer for adequate cooling, maintenance and servicing.
• In the State of California a spark arrester is required by law
(Section 4442 of the California Public Resources Code).
Other states may have similar laws. Federal laws apply on
federal lands. If you equip the muffler with a spark arrester,
it must be maintained in effective working order.
• Remove spark arrester screen for cleaning and
inspection.
• Replace if screen is damaged.

Air Cooling System

Over time debris may accumulate in cylinder cooling
fins and cannot be observed without partial engine
disassembly. For this reason, we recommend you have
an authorized Sears service dealer clean the cooling
system per recommended intervals (see "Maintenance
Schedule" on page 14). Equally important is to keep top
of engine free from debris. See "Clean Debris".
Keep areas within heavy line clear of debris.
Clean Combustion Chamber
We recommend you have an authorized Sears service
dealer remove combustion deposits from the cylinder,
cylinder head, top of piston and around valves per
recommended intervals (see "Maintenance Schedule"
on page 14).
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