Craftsman 247.88780 Operator's Manual page 15

1. Drain fuel from the tank by running the engine until the fuel tank is
empty. Be sure the fuel fill cap is secure.
2. Place a suitable oil collection container under the oil drain plug.
3. Remove the oil drain plug, Figure 13.
Oil Drain Plug
4. Tip the snow thrower back to drain oil into the container. Used oil
must be disposed of at a proper collection center.
5. Reinstall the drain plug and tighten it securely.
6. Refill with the recommended oil and check the oil level; refer to
Checking and Adding Oil in the Assembly Section.
7. Reinstall the oil filler cap/dipstick securely.
Spark Plug
WARNINg
DO NOT check for a spark with the spark plug removed. DO NOT
crank the engine with the spark plug removed.
WARNINg
If the engine has been running, the muffler will be very hot. Be careful
not to touch the muffler.
The spark plug should be checked every 25 hours and changed once
a season or every 100 hours. To ensure proper engine operation, the
spark plug must also be properly gapped and free of deposits.
SERVICE AND MAINTENANCE
Figure 13
1. Remove the three screws that secure the lower panel. Remove the
lower panel by lifting up on the panel to free the tabs at the bottom
of the panel from the tab slots and then pull back. See Figure 14.
NOTE: The bottom of the panel has tabs that help hold it in place.
2. Remove the spark plug boot and use a spark plug wrench to
remove the plug, Figure 15.
3. Visually inspect the spark plug. Discard the spark plug if there is
any apparent wear, or if the insulator is cracked or chipped. Clean
the spark plug with a wire brush if it is to be reused.
NOTE: A resistor spark plug must be used for replacement. Contact
a Sears Parts and Repair Center for a replacement spark plug (Part #
951-10292).
4. Re-install the lower panel by placing the tabs in the tab slots,
lifting the panel into place and secure with the three screws
15 removed in step 1.
Figure 14
Spark Plug
Spark Plug Boot
Figure 15