MTD 31BM62KE704 Operator's Manual page 22

6. Refill with the recommended oil and check the oil level;
refer to Operation section for instructions.
7. Reinstall the oil filler cap/dipstick securely.
CAUTION:
and water as soon as possible after handling
used oil.
NOTE:
Please dispose of used motor oil in a manner that is
friendly to the environment. Take it to a recycling center or other
collection center.
Spark Plug
WARNING!
plug removed. DO NOT crank engine with spark
plug removed.
WARNING!
muffler will be very hot. Be careful not to touch the
muffler.
To ensure proper engine operation, the spark plug must be
properly gapped and free of deposits.
1. Remove the spark plug boot and use a spark plug wrench
to remove the plug, Figure 7-3.
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.
22 s 7 — e
ectiOn ngine
Thoroughly wash your hands with soap
DO NOT check for spark with spark
If the engine has been running, the
Spark Plug
Spark Plug Boot
Figure 7-3
M
aintenance
3. Measure the plug gap with a feeler gauge. Correct as
necessary by bending side electrode, Figure 7-4. The gap
should be set to .02-.03 inches (0.60-0.80 mm).
Electrode
.02-.03 in.
(0.60-0.80 mm)
Figure 7-4
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- to 1⁄4-turn after
the spark plug seats to compress the washer.
CAUTION:
The spark plug must be tightened
securely. A loose spark plug can become very hot
and can damage the engine.