Exmark METRO 21 MPKA21 - Manual (Page 30)

Maintenance
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Lubricate fittings with one to two pumps of
NGLI grade #2 multi-purpose gun grease.
Refer to the following chart for fitting locations
and lubrication schedule.
Lubrication Chart
Fitting
Locations
Initial
Pumps
Number of
Places
Service
Interval
1. Pivot
Arms 2 2 50 Hours
2. Gear
Case 1 1 100 Hours
Lubricate the Gear Case
(Self-Propelled Units Only)
Service Interval: Yearly
1. Stop engine, wait for all moving parts to stop.
2. Remove the grass bag.
3. Install a grease gun onto the fitting through the
belt cover opening
Figure 28
1. Grease fitting 2. Belt cover
4. Gently apply one to two pumps of #2
multi-purpose lithium-base grease.
5. Install the grass bag.
Check Spark Plugs
Service Interval: Every 100 hours
1. Stop the engine and wait for all moving parts to
stop.
2. Disconnect the wire from the spark plug (Figure 9
and Figure 10).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Note: Replace a cracked, fouled, or dirty spark
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 inch (0.76 mm)
(Figure 29).
Figure 29
1. Side electrode 3. Air gap—0.030 inch
(0.76 mm)
2. Center electrode
insulator
6. Install the spark plug and the gasket seal.
7. Torque the plug to 17 ft-lb (23 N-m).
8. Connect the wire to the spark plug.
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