Spark Plug - Toro AC-1 Service Manual

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Figure 1-13. Squeezing Excess Oil from Air Filter
Element.
3.6051.013
5. Reinstall the air filter in the carburetor/air filter
base. Refer to Part 5
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Engine Reassembly
Spark Plug
Use a Champion RDZ19H spark plug. Every 50 hours
of operation, remove the spark plug, check its condi-
tion, and reset the gap or replace with a new plug as
necessary. Allow the engine to cool before removing
the spark plug.
WARNING: Electrical Shock!
Never touch electrical wires or components while the
engine is running. They can be sources of electrical
shock.
1. Before removing the spark plug, clean the area
around the base of the spark plug to keep dirt and
debris out of the engine.
2. Disconnect the spark plug wire and remove the
spark plug from engine.
3.
Inspect the spark plug for carbon buildup and clean
if necessary. Replace the plug if it is badly burnt or
if reuse is questionable.
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NOTE: Do not clean the spark plug in a machine
~
which uses abrasive grit. Some grit could remain on
the spark plug and enter the engine causing extensive
damage.
4. Check the spark plug gap using a wire feeler gauge.
Set the gap to 0.025 in (0.635 mm)(Figure 1-14).
5.
Reinstall the spark plug and torque to 100-110 in-lb
(1 1.3-1 2.3 N-m).
Figure 1-14. Spark Plug Gap.
3.6051.014
Carburetor Adjustment
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These engines are equipped with a diaphragm-type
carburetor. The carburetor has been carefully cali-
~
brated at the factory. In most cases, no further adjust-
ment will be required.
The condition of the air filter is very important to the
(
eration of the trimmer. A dirty air filter will restrict the
air flow to the carburetor. This in turn upsets the fuel-
air mixture in the carburetor. The resulting symptoms
are often mistaken for an out-of-adjustment carburetor
Therefore, check the condition of the air filter before
adjusting the carburetor. Refer to "Air Filter" Serv-
ice/Maintenance Instructions.
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