Replacing The Spark Plug - Toro Workman 07390 Operator's Manual

8. Add the specified oil to the crankcase of the
engine; refer to Checking the Engine-Oil Level
(page 25).
9. Lower the bed.

Replacing the Spark Plug

Service Interval: Every 400 hours
Spark plug type: Champion RC14YC
Air gap: 0.76 mm (0.030 inch)
1. Clean the area around the spark plug so foreign
matter cannot fall into the cylinder when you
remove the spark plug.
2. Pull the wires off the spark plug 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 and damaged
the engine.
1
1. Side electrode
2. Center electrode
4. Set the air gap
and side electrodes at 0.81 mm (0.032 inch).
5. Install the correctly gapped spark plug and
tighten them to 24.5 to 29 N∙m (18 to 22 ft-lb).
Note:
If you cannot use a torque wrench,
tighten the plug firmly.
6. Install the spark-plug wire.
47
(Figure
2 3 4
G019300
Figure 54
3. Insulator
4. Air gap at 0.76 mm (0.03
inch)
(Figure 54) between the center
54).
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