The muffler may be hot and could cause
injury.
Be careful while working around the
muffler.
2. Start the engine. Plug the normal muffler exit
with a block of wood or metal plate so that the
exhaust flow will be forced out of the clean-out
port. Continue to block the exit until carbon
deposits cease coming out of the port.
Do not stand in line with the clean-out
port.
Always wear safety glasses.
3. Stop the engine and replace the pipe plug.
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