Operator's Manual

Maintenance
12
Cleaning the Muffler Pipe and
Exhaust Port
POTENTIAL HAZARD
• Muffler and engine surfaces become hot
during operation.
WHAT CAN HAPPEN
• Contact with hot muffler and engine
surfaces could cause a burn.
HOW TO AVOID THE HAZARD
• Clean the muffler and exhaust port only
after the engine and muffler are cool.
Clean the end of the muffler pipe and the exhaust port
every 75 hours of operation.
1. Use a hardwood scraper to remove the carbon
from the end of the muffler pipe (Fig. 12).
2. Remove the Phillips screw, two hex nuts and
lock washers and remove the muffler cover and
attached muffler cover extension from the engine
(Fig. 12).
3
1
2
4
5
Figure 12
1. Hex Head Screw
2. Hex Nut and Lock
Washer (2)
3. Muffler Cover
4. Muffler Pipe
5. Phillips Screw
3. Remove the hex head screw, then remove the
muffler from the engine (Fig. 12).
4. Make sure the spark plug wire is off of the spark
plug, then slowly pull the starter rope until the
piston covers the exhaust port (Fig. 13).
5. Clean the carbon from the exhaust port with a
flat, hardwood scraper (Fig. 13).
IMPORTANT: Do not use a metal scraper or
similar object to clean the exhaust port. This
can damage the piston or cylinder.
2
3
1
Figure 13
1. Spark Plug
2. Exhaust Port
3. Spark Plug Wire
6. Check the muffler gasket and replace it if worn
or damaged.
7. Reinstall the muffler onto the engine, then
reinstall and tighten the hex head screw
(Fig. 12).
8. Reinstall the muffler cover and muffler cover
extension onto the muffler, then reinstall and
tighten the Phillips screw, and the two lock
washers and hex nuts (Fig. 12).