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Servicing the Spark Plugs
Ensure that the air gap between the center and side
electrodes is correct before installing the spark plugs.
Use a spark plug wrench for removing and installing
the spark plugs and a gapping tool/feeler gauge to
check and adjust the air gap. Install new sparks plugs
if necessary.
Type: Champion® RC12YC, Champion® Platinum
3071 or equivalent
Air Gap: 0.76 mm (0.030 inch)
Checking the Spark Plugs
Service Interval: Every 200 hours
1.
Look at the center of the spark plugs
If you see light brown or gray on the insulator,
the engine is operating properly. A black coating
on the insulator usually means that the air
cleaner is dirty.
Figure 20
1. Center electrode insulator
2. Side electrode
Important:
Always replace a spark plug
when it has a black coating, worn electrodes,
an oily film, or cracks.
2.
Check the gap between the center and side
electrodes
(Figure
(Figure
20) if the gap is not correct.
Removing the Spark Plugs
1.
Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
2.
Disconnect the wires from the spark plugs
(Figure
21).
(Figure
3. Air gap (not to scale)
20). Bend the side electrode
1. Spark-plug wire
20).
3.
Clean around the spark plugs to prevent dirt
from falling into the engine and potentially
causing damage.
4.
Remove the spark plugs and the metal washers.
Installing the Spark Plugs
1.
Install the spark plugs and the metal washer.
Ensure that the air gap is set correctly.
2.
Tighten the spark plugs to 24.4 to 29.8 N-m (18
to 22 ft-lb).
3.
Connect the wires to the spark plugs
Cleaning the Engine Screen
g001470
and the Oil Cooler
Service Interval: Before each use or daily
Before each use, check and clean the engine screen
and oil cooler. Remove any build up of grass, dirt or
other debris from the oil cooler and engine screen
(Figure
22).
1. Engine screen
2. Oil cooler
25
Figure 21
2. Spark plug
(Figure
Figure 22
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20).
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