Craftsman 536.773520 Operating Instructions Manual page 15

MAINTENANCE
HOW TO SERVICE
THE ENGINE AND SPARK PLUG
1. To access the engine or the spark plug, re-
move the engine debris shield as shown in
Figure 14.
2. After engine service is completed, replace
the engine debris shield.
SPARKPLUG
Check the spark plug every 25 hours. Re-
place the spark plug if the electrodes are
pitted or burned or if the porcelain is cracked.
1,
Make sure the spark plug is clean. Clean
the spark plug by carefully scraping the
electrodes (do not sand blast or use a wire
brush).
2.
Check the spark plug gap with a feeler
gauge. See "Product Specifications"for
the correct spark plug gap and replace-
ment spark plug.
3. Before installingthe spark plug, coat the
threads lightlywith oil for easy removal.
Tighten the spark plug to a torque of 15
foot-pounds.
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