Spark Arrestor Maintenance - Troy-Bilt TB75SS Manual Del Operador

MAINTENANCE AND REPAIR INSTRUCTIONS
Reinstalling the Air Filter/Muffler Cover
1. Place the air filter/muffler cover over the back of the
carburetor and muffler. Align the screw holes.
2. Insert the four (4) screws into the holes in the air
filter/muffler cover (Fig. 21) and tighten.
Do not over tighten.

SPARK ARRESTOR MAINTENANCE

1. Remove air filter/muffler cover. See Removing the
Air Filter/Muffler Cover.
2. Locate muffler front and the two (2) bolts securing it
to the engine. (Fig. 26). Remove the two (2) bolts
using a flatblade screwdriver or 5/16-inch socket or
nut driver. Pull muffler off of the engine.
3. Turn muffler over to the back side and locate the
exhaust gasket. Remove the muffler gasket from the
muffler (Fig. 26).
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. 27).
Remove spark arrestor from muffler.
5. Clean the spark arrestor with a wire brush. Replace if
damaged or unable to clean thoroughly (Fig. 27).
6. Reinstall the spark arrestor by pressing it into the
recessed hole on muffler's back side. Make sure it
fits tightly against the muffler and is not raised up.
7. Place exhaust gasket against muffler's back side.
Align exhaust gasket bolt holes with bolt holes in
muffler. While holding exhaust gasket in place, insert
bolts into muffler's front side. (Fig. 26).
8. Place muffler with exhaust gasket in place and bolts
inserted, against the engine, aligning the bolt holes.
Tighten bolts to secure muffler to the engine.
If using a torque wrench torque to:
80-90 in.•lb. (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.
Bolts
Muffler - Front Side
Spark
Arrestor
Muffler - Back Side
Fig. 27
NOTE: Maintenance, Replacement, or Repair of the
emission control devices and systems may be
performed by any non-road engine repair
establishment, individual or authorized service
dealer.
In order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary
after 50 hours of operation. If you notice lost RPM, poor
performance or general lack of acceleration, this service
may be required. If you feel your engine is in need of this
inspection, refer service to an authorized servicing
dealer, or establishment for repair. DO NOT attempt to
perform this process yourself as engine damage may
result from contaminant's involved in the cleaning
process for the port.
Exhaust
Spark
Gasket
Arrestor
Muffler - Back Side
Fig. 26
Flatblade
Screwdriver
Spark Arrestor
17