Craftsman C459-36410 Operator's Manual page 17

2. Visually inspect the spark plug. Discard the spark plug if there is apparent
wear, or if the insulator is cracked or chipped. Clean the spark plug with a
wire brush if it is to be reused.
3. Measure the plug gap with a feeler gauge. Correct as necessary by bending
side electrode. See Figure 22. The gap should be set to 0.030 in.
Electrode
0.030 in.
4. Check that the spark plug washer is in good condition and thread the spark
plug in by hand to prevent cross-threading.
5. After the spark plug is seated, tighten with a spark plug wrench to compress
the washer.
NOTE: When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer. When reinstalling a used spark plug,
tighten 1/8-1/4 turn after the spark plug seats to compress the washer.
IMPORTANT: The spark plug must be securely tightened. An improperly
tightened spark plug can become very hot and may damage the engine.
Fuel Filter Service
The fuel filter cannot be cleaned and must be replaced once a year or every 100
operating hours; more often if run with old gasoline.
1. Remove all fuel from tank by running engine until it stops from lack of fuel.
2. Remove hose clamp from fuel line and remove fuel line from tank outlet. See
Figure 23.
3. Pull out old fuel filter from tank outlet. Replace when dirty or damaged.
4. Grasp new fuel filter from shouldered end and insert it completely to the
shoulder into the tank outlet. eplace fuel line and c-clamp.
SERVICE AND MAINTENANCE
Figure 22
Clean Engine
If the engine has been running, allow it to cool for at least half an hour before
cleaning. Periodically remove dirt build-up from engine. Clean finger guard and
around muffler. Clean with a brush or compressed air.
IMPORTANT: Do not spray engine with water to clean because water could
contaminate fuel. Using a garden hose or pressure washing equipment can also
force water into the air cleaner or muffler opening. Water in the air cleaner will soak
the paper element, and water that passes through the element or muffler can enter
the cylinder, causing damage.
Accumulation of debris around muffler could cause a fire. Inspect and clean
before every use.
LUBRICATION
Blade Control
Lubricate pivot points on the blade control at least once a season with light oil. This
control must operate freely in both directions. See Figure 12.
17
Fuel Filter
Figure 23
WARNING