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78/83/90 Series Horizontal Shaft Engines
92
Muffler removal/replacement
1. Remove the two nuts that hold the manifold pipe to
the cylinder head using a 13mm wrench.
See Figure 8.3.
2. Lift the muffler off of the engine.
3. Clean all of the gasket material off of the cylinder
head and the muffler.
See Figure 8.4.
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.
NOTE: If reusing the muffler skip to step #8
4. Disconnect the manifold pipe from the muffler using
a 13mm wrench.
5. Clean all of the gasket material off of the manifold
pipe and the muffler.
Figure 8.3
Nuts
Figure 8.4
Remove all gasket material
Graphite gasket
Figure 8.5
Manifold pipe
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com