Service Manual

ManualsBrandsToro ManualsSnow ThrowerToro 38439

FUEL SYSTEM

Operation

The E en

ine uses a plastic fuel tank with a non-

replaceable 75 micron in-tank filter screen. The filter is

welded in the bottom of the tank over a sediment

reservoir. The tank is mounted above the level of the

carburetor and uses

ravity to supply fuel throu

h a

.25" I.D. (6.35 mm) rubber hose to the carburetor. The

fuel hose is friction-fitted to the tank outlet at one end

and to the carburetor at the other end.

The fuel tank is vented throu

h an openin

in the fuel

cap. The fuel openin

on the tank is opposite the fuel

outlet, helpin

to prevent dama

e to the filter screen by

funnels and

asoline filler spouts that may be inserted

into the fuel tank durin

refuelin

. The placement of

the cap also prevents interference with the startin

rope in Zone Start mower applications.

The fuel cap is a four piece desi

n (see Fi

ure 44) with

an inner sealin

disc that is vented to a baffle assembly

in the body of the cap. The baffle assembly allows

expansion in the tank or splash a

ainst the bottom of

the cap, without the loss of fuel. Atmospheric pressure

is allowed into the tank from an openin

in the cap to

allow

ravity to feed fuel to the carburetor. (If an

individual part of the cap fails, the entire assembly

must be replaced.)

ure 44

0720-022

Fuel Cap Service

1. The fuel cap may not be disassembled; however,

the vent openin

on the cap and inner sealin

disc

should be kept free of debris.

2. The ventin

ability of the cap may be tested by

fillin

the cap with water and observin

the flow of

water out of the vent openin

in the top of the cap.

If water does not drain, the vent openin

may be

plu

ed or restricted.

3. If the fuel cap will not vent properly, replace the

entire cap assembly.

4. Should you encounter a situation where fuel leaks

around the threads of the fuel cap (not out the

vent), inspect the top of the neck of the fuel tank

and the area in the cap where the fuel tank neck

contacts the cap. This is the sealin

area, not the

threads. (See Fi

ure 45.)

ure 45

720-021

Cleaning

1. Remove the fuel tank. Take it to an appropriate

area, and wash the tank in clean solvent intended

for cleanin

ine parts.

2. Backwash the filter screen by directin

cleanin

solvent, under moderate pressure, throu

h the

sediment reservoir and screen, opposite the

direction of fuel flow.

3. Wash the tank a

ain with clean solvent.

4. Clean or replace the fuel hose.