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3.
4.
Disconnect
the
wire leading to the ignition
switch and connect a continuity tester to the
switch wire and engine frame (Figure 3-2) with
the control bar in the "STOP" position there
should be continuity through the switch. With
the control bar in the "START" position, there
should be NO continuity through the switch.
Adjust the cable or replace the switch which-
ever is necessary to assure that the switch
and brake assembly are functioning properly.
Figure 3-2
BBC APPLICATIONS
Engines equipped with a Blade Brake Clutch (BBC)
mechanism, Models 47PD3,47PE4 and 47PF5
with serial numbers that start with
2 . . . . . ,
are fitted
with an ignition kill switch that is mounted on the
throttle linkage. (See Figure 3-3.) The ignition wire
is connected to the kill switch terminal.
When the lift bail is released the BBC mechanism
will stop the blade and
leave the engine running. To
stop the engine the throttle control is brought to the
stop position which will bring the governor spring
lever in contact with the kill switch grounding the
ignition and stopping the engine.
I
I
Spring Lever
Kill Switch
Bracket
Figure 3-3
FUEL TANK
If the engine stalls or will not start there may be a
fuel restriction or blockage. The fuel cap con-
tains a vent which, if plugged, will prevent fuel
from entering the carburetor.
1.
2.
3.
Remove the fuel cap and inspect the
vent.
Clean if necessary.
Visually inspect the bottom of the fuel tank
for dirt or other contaminants.
If dirt, water or other contaminants are
present the tank should be flushed with a
small amount of fresh fuel. This is most easily
accomplished when the fuel tank is removed.
(See Disassembly Instructions page IV-1).
a
CAUTION: The gasoline in the
fuel tank is explosive. Always
drain or fill tank outdoors, away from fire
and flame.
Do not smoke when fuel
vapors are present.
4. To ensure the fuel filter is
not plugged, remove
the fuel lines and check the fuel filter
for ease
of fuel flow. In some instances, the filter may be
cleaned by back-flushing with solvent or low
pressure compressed air.
NOTE: The bronze sintered filter in the fuel
tank is
not replaceable, however the remote mounted in-
line fuel filter found on
commercial engines may
be
replaced using Toro Part Number 56-6360. See
Figure 2-1 6.
TESTING COMPRESSION
A compression test of the engine can provide
vital information on the general condition of the
working parts within the
engine. This test will
indicate a worn cylinder, piston, or rings, and
generally determine whether the engine is re-
pairable or if it should be replaced.
1. Remove the spark plug and install a com-
pression gauge into the spark plug hole
(Figure 3-4).
Figure 3-4
111-2
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Troubleshooting
