Cub Cadet MTD P90 Series - Manual (Page 85)

Exhaust
79
The exhaust system is a frequently overlooked component of an engine. It is important to make sure the muffler
is in good condition and free of debris and/or insects.
NOTE: A blocked muffler will result in poor performance. If a muffler is completely blocked, the engine may not
start.
Spark arrestor (if equipped)
A spark arrestor, part #951-12329, is available as an
option.
NOTE: Spark arrestors are an option that are required on
all engines used in California and U.S. national
parks. See Figure 8.1.
The spark arrestor also serves to keep blockages out of
the exhaust system.
NOTE: Typical blockages include insect nests built during
the dormant season.
The spark arrestor should be checked and/or cleaned
every month. The spark arrestor can be inspected by shin-
ing a flash light into the muffler. See Figure 8.1.
If the spark arrestor needs to be cleaned or replaced:
1. Allow the engine to cool.
2. Remove the four screws, indicated by the arrows in
Figure 8.2. that retain the muffler shield using a
10mm wrench and lift it off of the engine.
3. Lift the muffler shield off of the engine.
4. Remove the spark arrestor retaining screw using a
#2 phillips screwdriver.
5. Pull the spark arrestor out of the muffler.
6. The spark arrestor can be:
• Replaced
• Cleaned by mechanical means
• Solvent cleaned
• Burned clean using a butane or propane torch.
7. Install the spark arrestor by following steps 1-3 in
reverse order.
Figure 8.1
Spark arrestor
Figure 8.2
CHAPTER 8: EXHAUST