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Replacing the Spark Plug
Service Interval: Every 100 hours
Use an NGK BR6HS spark plug or equivalent. The correct
air gap is 0.6 to 0.7 mm (0.024 to 0.028 inches).
1. Pull the molded wire off of the spark plug (Figure 26).
Figure 26
1. Spark plug wire
2. Clean around the spark plug and remove it from the
cylinder head.
Important: Replace a cracked, fouled, or dirty
spark plug. Do not sand blast, scrape, or clean
electrodes because engine damage could result
from grit entering the cylinder.
3. Ensure that the air gap is correct (Figure 27).
Figure 27
1. Spark plug air gap: 0.61 to 0.71 mm (0.024 to 0.028 inch)
4. Install the correctly gapped spark plug and tighten it
to 23 N-m (17 ft-lb).
5. Install the spark plug wire on the spark plug.
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Fuel System
Maintenance
Cleaning the Fuel Filter
Service Interval: After the first 20 hours
Every 100 hours
1. Close the fuel shut–off valve and unscrew the bowl
from the filter body (Figure 28).
1
1. Bowl
2. Clean the bowl and filter in clean gasoline and install it.
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2
Figure 28
2. Fuel shut–off valve
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