Toro GTS 150 Service Manual page 23

Clean the Cooling
System
Every25 hours, or every cutting season, the engine blower
housing must be removed and the cooling fins cleaned.
Failure to clean the cooling system may lead to engine
overheating and severe engine damage.
1. Stop the engine, allow it to cool and disconnect the
spark plug wire. Remove the key on electric start
models.
2. Remove the four
3/8"
hex, washer head screws that
retain the blower housing to the engine.
3.
Remove the gas cap and lift the blower housing and
recoil starter assembly away from the engine to ex-
pose the cooling fins. Replace the gas cap.
4. Remove dirt and debris with a cloth, brush or low
pressure,
30
psi (200 kPa) or less, air. When using
compressed air be sure to wear safety glasses to
prevent eye injury from airborne debris. See Figure 9.
W
Figure 9
5. Remove the gas cap and install the blower housing.
Replace the gas cap. Install the four
3/8"
hex, washer
head screws that retain the blower housing. Tighten
the screws to 50 in Ibs (5.6 N-m)
Preparing the Engine for Storage
For long termstorage, either remove gasoline from the fuel
tank and carburetor as described on page 16 or add a fuel
stabilizer to the gasoline. If the gasoline has been removed
from the fuel tank, start the engine and allow it to idle until
all the fuel is consumed and the engine stops. Repeat the
starting procedure two more times to assure all the gaso-
line is removed from the engine. If gasoline is not removed
from the carburetor in this manner, gum-like varnish
deposits will form and cause starting problems and/or poor
engine operation.
18
Fuel can be left
in
the fuel tank only
if a fuel additive such
as Toro's Stabilizer/Conditioner is added to the gasoline
and run through the engine before storage.
Toro's Stabilizer/Conditioner is petroleum distillate based.
The Toro Company does not recommend stabilizers with
-an alcohol base, such as ethanol, methanol or isopropyl
alcohol.
Under normal conditions, all fuel additives remain effective
in
fuel for
6-8
months.
1. Remove the spark plug and pour two tablespoons
(30
ml) of SAE
30
oil into the spark plug hole in the
cylinder. Pull the starter rope slowly to coat the inside
of the cylinder. Install the spark plug and tighten
to 14 ftIb (19Nm). Do not connect the spark plug wire.
2. Clean dirt and chaff from the cylinder, cylinder head
fins, and blower housing. Also remove grass clippings,
dirt and grime from the external parts of the engine,
shrouding and top of the mower housing.
3 . Clean the air cleaner: refer to the Maintenance Sec-
tion on Servicing the Air Cleaner on page 15.
4. Change the engine oil: refer
to the Maintenance
Section on Changing the Engine Oil on page 16.
5. Tighten all nuts, bolts and fasteners.
6. Store the engine in a clean, dry place. Cover the
engine to keep it clean and protected.
GTS 150