Spark Arrestor; Maintenance - Troy-Bilt AST TB75SS Operator's Manual

SPARK ARRESTOR MAINTENANCE
1. Remove the air filter/muffler cover. See Removing the
Air Filter/Muffler Cover.
2. Locate the muffler front and the two (2) bolts securing
it to the engine (Fig. 31). Remove the two (2) bolts
using a flatblade screwdriver or 5/16-inch socket or
nut driver. Pull the muffler off of the engine.
3. Turn the muffler over to the back side and locate the
exhaust gasket. Remove the muffler gasket from the
muffler (Fig. 31).
NOTE: If exhaust gasket is torn or damaged, replace
with a new gasket before reassembling muffler.
4. Using a small flatblade screwdriver, carefully pry up
the spark arrestor from the recessed hole (Fig. 32).
Remove the spark arrestor from muffler.
5. Clean the spark arrestor with a wire brush. Replace it
if it is damaged or if it is impossible to clean
thoroughly (Fig. 32).
6. Reinstall the spark arrestor by pressing it into the
recessed hole on the muffler's back side. Make sure
it fits tightly against the muffler and is not raised up.
7. Place the exhaust gasket against the muffler's back
side. Align the exhaust gasket bolt holes with the bolt
holes in the muffler. While holding the exhaust gasket
in place, insert bolts into muffler's front side (Fig. 31).
8. Place the muffler (with the exhaust gasket in place
and the bolts inserted) against the engine, aligning
the bolt holes. Tighten the bolts to secure the muffler
to the engine.
If using a torque wrench torque to:
80-90 in..Ib. (9-10.2 N.m).
WARNING: If muffler is not tightened
securely, it Could fall off Causing damage to
the unit and possible serious personal injury.
9. Reinstall air filter/muffler cover.
Muffler - Front Side
Spark
Arrestor
Muffler - Back Side
Fig. 31
Fig. 32
Spark Exhaust
Arre_or Gasket
\
\
\
\
\
\
Muffler - Back Side
Flatblade
Screwdriver
Spark Arrestor
16