Replacing The Spark Plugs - Toro 30809 Operator's Manual

1
Figure 52
1. Engine oil filter
3. Add oil to the crankcase; refer to Checking the Engine
Oil Level.
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Replacing the Spark Plugs

Service Interval: Every 400 hours
The spark plugs usually last a long time; however, the
plugs should be removed and checked whenever the engine
malfunctions or every 400 hours. Replace the spark plugs
to ensure proper engine performance and reduce exhaust
emission level.
The correct spark plug to use is a Champion RC 14YC or
NGK BPR 4ES.
1. Clean the area around the spark plugs so foreign matter
cannot fall into the cylinder when you remove the
spark plug.
2. Pull the wires off of the spark plugs and remove the
plugs from the cylinder head.
3. Check the condition of the side electrode, center
electrode, and center electrode insulator to ensure that
there is no damage.
Important: A cracked, fouled, dirty, or otherwise
malfunctioning spark plug must be replaced. Do
not sand blast, scrape, or clean electrodes by using
a wire brush because grit may eventually release
from the plug and fall into the cylinder. The result
is usually a damaged engine.
1. Air gap at 0.81 mm (0.032 inch)
4. Set the air gap one each plug between the center and
side electrodes at 0.81 mm (0.032 inch).
5. Install the correctly gapped spark plugs and tighten
them to 24.5 to 29 N-m (18 to 22 ft-lb). If you cannot
use a torque wrench, tighten the plugs firmly.
6. Install the spark plug wires
Figure 53