Exmark Metro 21 - Manual (Page 23)

19
Lubricating the Pivot Arms
Self-propel Model only
After every 25 operating hours or when the season ends,
lubricate the pivot arms.
1. Move the rear wheel cutting height levers to the center
setting.
2. Wipe the grease fittings with a clean rag (Fig. 22).
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Figure 22
1. Grease fitting
3. Install a grease gun onto the fitting and gently apply
two or three pumps of #2 multi-purpose lithium base
grease (Fig. 22).
Note: Applying grease with excessive pressure may
damage the seals.
Adjusting the Self-propel Drive
Self-propel Model only
If the lawn mower does not self-propel or has a tendency
to creep forward when the control bar is more than 1-1/2
inches (3.8 cm) from the handle, adjust the wheel drive
control knob on the rear of the gear box (Fig. 23).
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Figure 23
1. Control knob
1. Close the door in the lawn mower housing and remove
the grass bag.
2. Rotate the control knob clockwise
!/2 turn if the lawn
mower does not self-propel. If the lawn mower creeps
forward, rotate the knob
!/2 turn counterclockwise
(Fig. 23).
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. 24).
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Figure 24
1. One inch (2.5 cm)
Changing the Engine Oil
Change the oil after the first 5 operating hours (or the first
month); and then after every 50 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 7.
10. Insert the dipstick into the filler neck and rotate the
cap clockwise until it is tight.