Replacing The Spark Plugs - Toro Workman HD 07369 Operator's Manual

1. Raise the bed (if so equipped) and place the safety
support on the extended lift cylinder to hold up the
bed.
2. Remove the drain plug and let oil flow into a drain pan
(Figure 39). When the oil stops, install the drain plug.
Figure 39
1. Engine oil drain plug
2. Engine oil filter
3. Remove the oil filter (Figure 39).
4. Apply a light coat of clean oil to the new filter seal
before screwing it on.
5. Screw the filter on until the gasket contacts the
mounting plate, then tighten the filter 1/2 to 2/3 of a
turn. Do not overtighten.
6. Add oil to the crankcase; refer to Checking the Engine
Oil Level.

Replacing the Spark Plugs

Service Interval: Every 800 hours
The spark plugs usually last a long time; however, the
plugs should be removed and checked whenever the engine
malfunctions. Replace the spark plugs to ensure proper
engine performance and reduce exhaust emission level.
The correct spark plug to use is a Champion RC 12YC or
equivalent.
The recommended air gap is 1 mm (0.040 inch).
1. Clean the area around the spark plugs so foreign matter
cannot fall into the cylinder when you remove the
spark plug.
2. Pull 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 1 mm (0.040 inch)
4. Set the air gap one each plug between the center and
side electrodes at 1 mm (0.040 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.
36
Figure 40