Echo X750409-3607 - Manual (Page 18)

16
CLEANING CYLINDER FINS
(Check Periodically)
NOTE
Clogged fins will cause poor engine cooling.
1. Carefully remove housing and clean dirt and
dust from fins.
2. Reinstall housing.
CLEANING SILENCER AND
EXHAUST PORT
(Check Periodically)
1. Carefully remove housing halves.
2. Remove and disassemble silencer.
NOTE
Be careful not to scratch the cylinder or piston
when cleaning the cylinder exhaust port.
3. Clean deposits from cylinder exhaust port and
silencer.
Cylinder fins
Silencer
Silencer cover
EXHAUST PORT CLEANING
Level 2.
Tools required: 4 mm Hex Wrench, Wood or
plastic scraper
Parts Required: As needed: Heat Shield
1. Remove spark plug lead from spark plug, and
remove engine cover (2 screws).
2. Place piston at top dead center. Remove
muffler (A) and heat shield (B).
3. Use a wood or plastic scraping tool to clean
deposits from cylinder exhaust port.
4. Inspect heat shield, and replace if damaged.
5. Install heat shield and muffler.
IMPORTANT
Never use a metal tool to scrape carbon from
the exhaust port.
Do not scratch the cylinder or piston when
cleaning the exhaust port. Do not allow
carbon particles to enter the cylinder.
A
B