Hayter Mowers 21in Heavy-Duty Walk-Behind Rotary mower 455E - Manual (Page 20)

Figure 26
1. Gasket
8. Install the new filter and hand tighten it 2/3 turn
only.
9. Fill the crankcase to the Full line on the dipstick with
fresh oil Refer to Filling the Crankcase with Oil.
10. Connect the wire to the spark plug.
11. Run the engine for about 3 minutes.
12. Stop the engine, wait for all moving parts to stop,
and check for oil leakage around the filter.
13. Add oil to compensate for the oil in the oil filter.
Refer to Checking the Engine Oil Level.
14. Recycle the used oil filter according to local codes.
Servicing the Spark Plug
Service Interval: Every 100 hours—Check the spark
plug.
Use an NGK BPR5ES spark plug or equivalent.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Figure 12).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important: 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 in. (0.76 mm)
(Figure 27).
Figure 27
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
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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