Toro 51603 Maintenance And Repair Manual page 18

DISASSEMBLY, REPAIR,
REASSEMBLY INSTRU'CTIONS
Carburetor Re-Assembly
1 . Install a new filter screen with any appropriate
hollow tube or tool of approximately ,300 inch
diameter. NOTE: The screen must be pushed in
far enough to be below the fuel inlet hole.
2. Inspect the circuit plate for flatness and correct if
3.
Inspect the new circuit plate diaphragm and
gasket for flatness. Install the circuit plate, circuit
diaphragm and circuit plate gasket with dia-
phragm in contact with the plate and gasket in
contact with body casting. Use only moderate
pressure on the circuit plate screw so as not to
warp the circuit plate.
4. Install the metering lever components and adjust
the metering lever to be flush with the surface of
the circuit plate, Fig.
23.
necessary.
5. Install the high and low speed needles and set at
approximately 1 and 1/4 turns open. The high and
low speed letters are indicated on the side of the
carburetor casting. The high speed needle is the
long needle and the low speed needle is the short
needle.
6. Install the metering diaphragm and related com-
ponents as follows: Install the gasket over the
locator pins on the casting. Next, install the
metering diaphragm over the locator pins on the
casting. (The metering plate pin must be in con-
tact with the metering lever.) Next, install the
metering diaphragm cover with four screws. The
vent hole in the cover should be located opposite
the throttle valve.
7 . With the large single screw, install the fuel pump
cover with the fuel pump diaphragm in contact
with the body casting and with the fuel pump
gasket in contact with the fuel pump cover. The
extension on the cover should be located on the
same side as the throttle lever.
8. Visually inspect the carburetor and tighten all
screws.
Figure 23
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