Changing The Engine Oil; Servicing The Spark Plug - Toro 22168 Operator's Manual

3. Slowly pull the lawn mower rearward while you
gradually move the control bar toward the handle.
Note: The adjustment is correct when the rear wheels stop
turning and the control bar is about one inch (2.5 cm)
from the handle (Fig. 30).
1
Figure 30
1. One inch (2.5 cm)

Changing the Engine Oil

Change the oil after the first 8 operating hours (or the first
month); and then after every 100 operating hours (or every
6 months).
1. Run the engine to warm the engine oil.
Note: Warm oil flows better and carries more
contaminants.
Warning
Oil may be hot after engine has been run, and
contact with hot oil can cause severe personal
injury.
Avoid contacting the hot engine oil when you
drain it.
2. Stop the engine and wait for all moving parts to stop.
3. Disconnect the wire from the spark plug (Fig. 6).
4. Place a suitable drain pan under the dipstick/oil drain
(Fig. 6).
5. Clean around the dipstick.
6. Remove the dipstick by rotating the cap
counterclockwise and pulling it out.
7. Raise the left side of the lawn mower to drain the oil
from the dipstick fill tube into the drain pan.
8. After draining the oil, return the lawn mower to the
operating position.
9. Fill the crankcase with fresh oil to the upper limit
mark on the dipstick. Refer to the Filling the
Crankcase with Oil on page 9.
10. Insert the dipstick into the filler neck and rotate the
cap clockwise until it is tight.
11. Wipe up any spilled oil.
12. Connect the wire to the spark plug.
13. Recycle the used oil according to local codes.

Servicing the Spark Plug

Check the spark plug after every 100 operating hours or
yearly; replace it after every 250 operating hours or every
2 years. Use an NGK
W16EPR-U spark plug or equivalent.
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1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig. 6).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important
plug. Do not clean the electrodes because grit entering the
cylinder can damage the engine.
5. Set the gap on the plug to 0.030 in. (0.76 mm)
(Fig. 31).
1. 0.030 in. (0.76 mm)
6. Carefully install the spark plug by hand (to avoid cross
threading) until it is hand tight.
7. Tighten the spark plug an additional 1/2 turn if it is
new; otherwise, tighten it an additional 1/8 to 1/4 turn.
Important
and can damage the engine; overtightening a spark plug
may damage the threads in the cylinder head.
8. Connect the wire to the spark plug.
23
)
BPR5ES or Nippondenso
Replace a cracked, fouled, or dirty spark
1
Figure 31
A loose spark plug can become very hot
)
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