Toro 51643 Service Manual page 82

SECTION 19 Spark Arrestor Muffler
Spark arrestor mufflers are available for the straight shaft
trimmers. These mufflers use a metal screen at the
muffler to prevent sparks from exiting the muffler
chamber.
They are recommended when trimming in dry areas and
may be required by state or local laws.
Spark Arrestor Muffler Removal
1. Remove the three screws that secure the muffler
cover to the engine and remove the cover. See
Figure 164.
Figure 164
3. Install the new muffler cover with three Phillips
head screws.
Spark Arrestor Muffler Maintenance
After every 50 hours of use, the arrestor screen and
muffier body should be removed and soaked in a
commercial carbon remover per the manufacturer's
instructions.
1.
Remove the muffler as described under Spark
Arrestor Muffler Removal, page 71.
2.
Remove the two screws securing the spark
arrestor to the muffler. See Figure 165
2.
Remove the two nuts securing the muffler to the
engine and the Phillips head screw near the fuel
tank. Remove the muffler.
3.
Remove the two Phillips head screws that secure
the arrestor screen to the muffler and remove the
screen.
3.
Soak the muffler and the spark arrestor screen in
a commercial carbon remover per the
manufacturer's instructions.
4. Blow out any loose carbon with compressed air.
Spark Arrestor Muffler Installation
1. If installing the spark arrestor muffler for the first
time, remove the original muffler cover and muffler.
2. Place the muffler gasket on the studs and install
the muffler. Secure with the two hex nuts and the
Phillips head screw.
IMPORTANT Before reinstalling the muffler, be sure
to remove all loose carbon particles
or
engine
damage may result.
5. Reinstall the muffler as described under Spark
Arrestor Muffler Installation, page 71.
71