61/65/70/75 Series Horizontal Shaft Engines
90
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.
4. The spark arrestor can be:
• Replaced
• Cleaned by mechanical means
• Solvent cleaned
• Burned clean using a butane or propane torch.
5. Install the spark arrestor by following steps 1-3 in
reverse order.
To remove/replace the muffler
1. Remove the two muffler nuts using a 13mm wrench.
See Figure 8.4.
2. Lift the muffler off of the engine.
3. Clean all of the gasket material off of the cylinder
head and the muffler (if reusing the muffler). See
Figure 8.5.
NOTE: The MTD engine uses a graphite exhaust
gasket. It is not reusable and must be
replaced every time the muffler nuts are
loosened.
NOTE: The graphite exhaust gasket transfers heat
from the cylinder head to the muffler. The
heat transfer helps to keep the engine oper-
ating temperature under control. Do not sub-
stitute an exhaust gasket made from another
material.
4. Install a new gasket.
5. Install the muffler and tighten the muffler nuts. Refer
to the table at the end of Chapter 10 for the proper
torque.
6. Test run the engine before returning to service.
Figure 8.4
Remove
these nuts
Figure 8.5
Remove all gasket material
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