Toro 51958 User Manual

20
Figure 18
Spark
Plug
Spark Plug Boot
Figure 17
Spark
Arrestor
Plate
Muffler
Cover
Muffler
Gasket
Screw(s)
Screw(s)
Cover
Screw(s)
Muffler
Operation
Replacing the Spark Arrestor
See Figure 17.
WARNING:
Stop engine, remove spark plug boot, and allow
engine and muer to cool before replacing
the spark arrestor. Contact with a hot muer
or engine could cause burns or other serious
personal injuries.
NOTICE:
The spark arrestor on this product has not been
evaluated by the USDA Forest Service and
cannot be used on U.S. forest lands. In addition,
product users must comply with Federal, State,
and local re prevention regulations. Check
with appropriate authorities. Contact customer
service or a qualied service center to purchase
a replacement spark arrestor.
Note: Depending on the type of fuel used, the type and
amount of lubricant used, and/or your operating conditions,
the exhaust port, muer, 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 qualied 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 ve 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 muer assembly in
place.
4. Remove the muer assembly and muer gasket. It
may be necessary to work the muer assembly free
from the muer gasket.
5. Separate the muer cover from the muer.
6. Remove the three screws that hold the plates on the
muer.
7. Remove the spark arrestor.
8. Replace the old spark arrestor with the new one.
9. Reassemble the muer by reinstalling the plates and
tightening the three screws (torque to 7 in.lb
(0.79 Nm) minimum, 13 in.lb. (1.46 Nm) maximum).
10. Reassemble the muer and muer cover and attach to
the muer gasket with the two screws.
11. Reinsert the muer 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 ve
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 item numbers included in this manual use a Champion
RCJ4, RCJ6Y or equivalent spark plug. Use a recommended
or equivalent 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.

Toro 51958 Specifications

General

Type	String Trimmer
Power Source	Gas
Adjustable Handle	Yes
Line Feed	Bump Feed
Engine Type	2-Cycle
Fuel Tank Capacity	14 oz
Shaft Type	Curved
Line Diameter	0.095 in
Handle Type	Loop
Warranty	2 years