EXHAUST
58
The exhaust system is a frequently overlooked compo-
nent of an engine. It is important to make sure the muf-
fler is in good condition and free of debris and/or
insects.
NOTE: A blocked muffler will result in poor per-
formance. If a muffler is completely blocked the
engine may not start.
Summer engines
One of the main differences between the summer and
the snow engines is the exhaust system. Because of
this they will be addressed separately.
Spark arrestor
The spark arrestor should be checked and/or cleaned
every month.
NOTE: The spark arrestor also serves to keep
blockages out of the exhaust system. Typical
blockages include insect nests built during the
dormant season.
The spark arrestor can be inspected by shining a flash
light into the muffler. See Figure 8.1.
Figure 8.1
Spark arrestor
Retaining screw
If The spark arrestor needs to be cleaned or replaced:
1. Remove the four screws that retain the muffler
shield using a 8mm wrench and lift it off of the
engine.
See Figure 8.2.
2. Remove the spark arrestor retaining screw using
a #2 phillips screwdriver.
See Figure 8.1.
3. Pry the spark arrestor out of the muffler. See
Figure 8.3.
Figure 8.2
Muffler shield
Remove these
screws
Figure 8.3
CHAPTER 8: EXHAUST
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