Figure 32
1. Side electrode
2. Center electrode
5.
Install the correctly gapped spark plug carefully
by hand to avoid cross-threading.
6.
After the spark plug is seated, tighten it with a
spark-plug wrench as follows:
•
When installing a new spark plug, tighten
it 1/2 turn after the spark plug seats, to
compress the gasket.
•
When installing the original spark plug,
tighten it 1/8 to 1/4 turn after the spark plug
seats, to compress the gasket.
Important:
A loose spark plug can overheat
and damage the engine. Overtightening the
spark plug can damage the threads in the
cylinder head.
7.
Connect the spark-plug wire to the spark plug.
Checking and Adjusting the
Valve Clearance
Service Interval: Every 300 hours
Important:
Refer to your authorized Toro
distributor for service.
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3. Insulator
4. 0.70 to 0.80 mm (0.028 to
0.031 inch)
Fuel System
Maintenance
Cleaning the Sediment Cup
Service Interval: Every 100 hours—Clean the
sediment cup.
1.
Prepare the machine for maintenance; refer to
Preparing for Maintenance (page
2.
Move the fuel-shutoff valve to the O
(Figure
33).
1. Fuel-shutoff valve
2. O-ring
3.
Remove the fuel sediment cup and O-ring
(Figure
33).
4.
Check the O-ring for wear and damage; replace
the O-ring if it is worn or damaged.
5.
Wash the sediment cup and O-ring in
nonflammable solvent, and dry them thoroughly.
6.
Place the O-ring in the fuel-shutoff valve and
install the sediment cup
sediment cup securely.
28
22).
position
FF
Figure 33
3. Sediment cup
(Figure
33). Tighten the
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