Toro 51957 Manual Del Operador página 20

9. Replace the air filter (fits only one way).
10. Replace the air filter cover.
11. Tighten the air filter cover by turning the knob clock-
wise.
12. Replace the spark plug boot.
Note: Replace the air filter as indicated by the mainte-
nance schedule.
Replacing the Spark Arrestor
See Figure 17.
WARNING:
Stop engine, remove spark plug boot, and allow
engine and muffler to cool before replacing
the spark arrestor. Contact with a hot muffler
or engine could cause burns or other serious
personal injuries.
Note: Depending on the type of fuel used, the type and
amount of lubricant used, and/or your operating conditions,
the exhaust port, muffler, and/or spark arrestor screen may
become blocked with carbon deposits. If you notice a power
loss with your gas powered tool, you may need to remove
these deposits to restore performance. We highly recom-
mend that only qualified service technicians perform this
service.
The spark arrestor may need to be cleaned or replaced after
repeated use. If replacement is necessary, use Toro part
number 000998216.
To replace the spark arrestor:
1. Remove the five screws that hold the cover.
Note: Removing these screws requires the use of a T20
and T25 torx screwdriver.
2. Remove the cover.
3. Remove the two screws holding the muffler assembly in
place.
Cover
Screw(s)
Muffler
Gasket
Muffler
Plate
20
Spark
Muffler
Arrestor
Cover
Screw(s)
Screw(s)
Figure 17
4. Remove the muffler assembly and muffler gasket. It
may be necessary to work the muffler assembly free
from the muffler gasket.
5. Separate the muffler cover from the muffler.
6. Remove the three screws that hold the plates on the
muffler.
7. Remove the spark arrestor.
8. Replace the old spark arrestor with the new one.
9. Reassemble the muffler by reinstalling the plates and
tightening the three screws (torque to 18 in.lb
(2.03 Nm) minimum, 22 in.lb. (2.49 Nm) maximum).
10. Reassemble the muffler and muffler cover and attach to
the muffler gasket with the two screws.
11. Reinsert the muffler assembly and tighten two screws to
engine (torque to 60 in.lb (6.78 Nm) minimum, 80 in.lb.
(9.04 Nm) maximum).
12. Reinstall the cover on the tool and fasten with the five
screws (torque to 16 in.lb (1.81 Nm) minimum,
22 in.lb. (2.49 Nm) maximum).
Note: Do not over-tighten screws.
Replacing the Spark Plug
See Figure 18.
All model numbers included in this manual use a Champion
RCJ4 or RCJ6Y spark plug. Use an exact replacement and
replace annually.
1. Remove the spark plug boot.
2. Loosen the spark plug by turning it counterclockwise
with a socket.
3. Remove the spark plug.
4. Inspect the new spark plug. The spark plug must be
properly gapped and free of deposits in order to ensure
proper engine operation. The correct gap is approxi-
mately 0.025 in. (0.64 mm). To widen gap, if necessary,
carefully bend the ground (top) electrode. To lessen
gap, gently tap ground electrode on a hard surface.
5. Hand thread the new spark plug, turning it clockwise.
Spark Plug Boot
Spark
Plug
Figure 18
Operation