Carburetor; Storage - Toro GTS 120 Service Manual

CARBURETOR
The non-adjustable carburetor has a number of
small orifices which control the flow of fuel and
air to obtain the proper combustable mixtures. If
stale or dirty fuel enters the carburetor, deposits
can form causing adverse changes to this
cornbustable mixture. To clean the carburetor it
must first be removed and disassembled. (See
Disassembly Instructions.) Soak all metal parts in
carburetor cleaner to remove deposits. THE
BOWL SEAL, FLOAT AND NEEDLE VALVE
TOR CLEANER OR DAMAGE MAY RESULT.
Replace any damaged or questionable compo-
nents before reassembly (Figure 2-1 7).
SHOULD NOT BE CLEANED WITH CARBURE-
Pilot Jet
Float Pivot Pin
Needle Valve
Bowl Seal
Engine Model 47P22
Bowl Carburetor
Standard Main Jet #80
Toro Part No. 8 1 - 1 0 4 0
Optional High-altitude
Main Jet #77.5
Tor0 Part No. 81 -1 050
Figure 2-1 7
Carburetors used on models 47PD3,47PE4 and
47PF5 (see Figure 2-1 8), use a metal choke shaft
with a plastic bushing, an atmospheric vent tube
and an alcohol resistant float. The floats used on
47PZ2 carburetors should be replaced with a 81-
0970 float. This float is black and is equipped with a
metal hinge. Correct float height is 17.5 mm (1 1 /16
in). The standard main jet is a number 76.3 (part
number 81-1 940). There is a lean, number 72.5,
main jet (part number 81 -2340) available for high
altitude conditions.
The standard main jet on 47PZ2 carburetors is a
number 80 (part number 81 -1 040) with a high alti-
tude (77.5 jet part number 81 -1 050) option.
Models 47PD3, 47PE4 and 47PF5 are also
equipped with a heat deflector and insulator as
shown in Figure 2-1 8). Model 47PZ2 was built with-
out insulators or heat deflectors. This model may
be fitted with a heat shield kit number 81 -221 0 to
prevent hot restart problems.
47PD3,47PE4,47PF5
Engine Model
Carburetor
Standard Main Jet
Toro Part No. 81-1940
High Altitude Main Jet
Toro Part No. 81-2340
Figure 2- 18
STORAGE
Drain the gasoline from the fuel tank. After the gas-
oline is drained, start the engine and let it run until
all fuel is expended. Move the recoil starter a num-
ber of times to assure all fuel is expended. All gas-
oline must be removed to prevent gumlike varnish
deposits from forming in the fuel system. Pull the
high tension wire off the spark plug. Clean the area
around the plug to prevent dirt from entering the
cylinder when the plug is removed. Remove the
plug from the cylinder head and pour two tea-
spoons of two-cycle oil into the spark plug hole.
Pull the recoil starter handle slowly to distribute
the oil inside of the cylinder. Install the spark plug
and tighten to the recommended torque. DO NOT
INSTALL THE HIGH TENSION WIRE ON THE
SPARK PLUG. Pull the recoil starter slowly until a
positive resistance is felt. This will ensure the com-
bustion chamber is sealed by the piston to prevent
any damage which might be caused by the envi-
ronment. Clean the dirt and chaff from the outside
of the cylinder, cylinder head fins and blower hous-
ing. The air cleaner assembly should be serviced
as mentioned earlier in this section. For lawn
mower storage instructions refer to the Operators
Manual.