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Servicing the Spark Plug
Service Interval: Every 100 hours—Inspect and adjust the
spark plug; replace it if necessary.
Every 200 hours—Replace the spark plug.
Use an NGK BPR6ES spark plug or equivalent.
1. Set the Dyna-Clutch lever to the Stop position, stop
the engine, and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug.
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 0.76 mm (0.030 inch); refer
to Figure 21.
1
2
Figure 21
1. Side electrode
2. Center electrode
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: A loose spark plug can become very
hot 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.
3
4
G019300
3. Insulator
4. 0.76 mm (0.030 inch) gap
Belt Maintenance
Adjusting the Belt Tension
Service Interval: Before each use or daily
4
3
2
1
1. Belt tension pulley
2. Belt
3. Belt guide
Removing the Belt
1. Stop the machine on a level surface, place the
Dyna-Clutch lever in the Stop position, stop the engine,
and disconnect the spark plug wire.
2. Remove the 2 hex-washer head bolts that secure the
belt guard to the belt-guard brackets.
3. Remove the belt guard.
4. Slip the belt off the belt-tension pulley (Figure 22).
5. Slip the belt off the gearbox pulley.
6. Slip the belt off the engine pulley and remove the belt.
17
Figure 22
4. Engine pulley
5. Gearbox pulley
5
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