Craftsman 31AS63TF799 Operator's Manual page 19

Changing Engine Oil
NOTE: Change the engine oil after the first 5 hours of operation and
once a season or every 50 hours thereafter.
1. Drain fuel from tank by running engine until the fuel tank is empty.
Be sure fuel fill cap is secure.
2. Place suitable oil collection container under oil drain plug.
3. Remove oil drain plug. See Figure 18.
4. Tip engine to drain oil into the container. Used oil must be
disposed of at a proper collection center.
CAUTION
Used oil is a hazardous waste product. Dispose of used oil properly.
Do not discard with household waste. Check with your local authori-
ties or Sears Service Center for safe disposal/recycling facilities.
5. Reinstall the drain plug and tighten it securely.
6. Refill with the recommended oil and check the oil level.
Recommended Oil Usage chart. The engine's oil capacity is 20
ounces.
-40º -20º
-30º -20º -10º 0º
CAUTION
DO NOT use non detergent oil or 2-stroke engine oil. It could shorten
the engine's service life.
7. Reinstall the oil filler cap/dipstick securely.
CAUTION
Thoroughly wash your hands with soap and water as soon as
possible after handling used oil.
Checking Spark Plug
WARNINg
DO NOT check for spark with spark plug removed. DO NOT crank
engine with spark plug removed.
WARNINg
If the engine has been running, the muffler will be very hot. Be careful
not to touch the muffler.
NOTE: Check the spark plug once a season or every 25 hours of
operation. Change the spark plug once a season or every 100 hours.
To ensure proper engine operation, the spark plug must be properly
gapped and free of deposits.
SERVICE AND MAINTENANCE
See
Synthetic
0W-30
5W-30
0º 20º 40º
Oil Drain
Plug
1. Remove the spark plug boot and use a spark plug wrench to
remove the plug. See Figure 19.
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.
19
Figure 18
Spark Plug
Spark Plug Boot
Figure 19