Spark Plug - Craftsman 536.887990 Operator's Manual

NOTE: The oilwill d rain more freely
when theengine i swarm.
3. After d raining alltheoil,reinstall the
oildrain plug securely.
4. Fill t heengine c rankcase with
S.A.E. 5W30 motor oil,pouring
slowly. DONOT OVERFILL. See
"To AddOil"intheOperation Sec-
tion.
SPARK PLUG
Check the spark plug every twenty-
five (25) hours. Replace 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 and reset gap to 0.30"
if necessary. See Figure 15.
3.
Before installing the spark plug,
coat the threads lightly with oil for
easy removal. Tighten the spark
plug to a torque of 15 foot-pounds.
Feeler Gauge
0.030"
Spark Plug
Figure 15
F-021005L 18