Toro 51643 Service Manual page 20

Maintenance Spark Plug
The TC3000, TC4000 and the TC5000 each use an NGK
BMGA spark plug or the equivalent. Correct gap is 0.6-0.7
mm (0.024-0.028"). The recommended servicing interval
for the spark plug is 25 hours of operation.
1. Stop the engine and pull off the spark plug wire.
2.
Clean around the spark plug and remove the spark
plug from the engine using a 19mm (3/4") socket.
IMPORTANT: Replace a cracked, fouled or dirty
spark plug. Do not sand blast, scrape or clean
electrodes because engine damage could
result
from
grit entering the cylinder.
3. Set the plug gap to 0.6-0.7mm (.024-.028") See
Figure 3.
5.
Push the pickup assembly back into the tank and
install the gas cap.
I 3
.024 .028"
(0.6 0.7 mm)
Figure 3
4. Reinstall the plug and gasket in the engine. Tighten
to 1.2 kg m
(1 04 in Ibs)
Maintenance Fuel Filter
Fuel filter replacement is recommended after every 25
hours of operation.
1. Drain the fuel from the fuel tank into a container
designed for gasoline. Start the engine and let
it
run at idle speed until
it
stops and all fuel is
expended.
2. Remove the fuel tank cap. Insert a clean wire with
a hooked end into the tank and hook the pickup
tube above the filter. Pull the filter and hose out the
fuel tank opening. See Figure 4.
3. Remove the filter by holding the black tubing and
pulling the filter straight off.
4. Replace the filter assembly.
Figure
4
Maintenance Cooling System
Before each use, visually inspect the cooling air inlet, the
cooling fins, and the openings around the muffler for
debris. Obstruction of these areas could lead to
overheating and possible engine damage.
Be careful not to damage the cooling fins during
cleaning.
Maintenance Trimmer Implement
The trimmer implements require no lubrication.
However, cleaning of the implement and the drive shaft
area is recommended after every 25 hours of operation.
More frequent cleaning may be required if trimming in
very tall grass or if the implement area gets excessively
hot.
Refer to the Table of Contents for the location of
information on removal and cleaning of your particular
implement.
Maintenance Preparation
for
Storage
The following procedure is recommended to ensure
proper operation of the trimmer before storage of more
than a month.
1. Drain the fuel from the tank into a container
designed for gasoline. Start the engine and let
it
run at idle speed until
it
stops and all fuel is
expended.
2. Remove dirt and grime from external parts of the
trimmer. Ensure that the cooling fins are clean.
3. Pull the spark plug wire off the spark plug. Clean
around the plug so that debris will not fall into the
sparkplug hole when the plug is removed. Remove
the spark plug.
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