Echo SRM-225I Trimmer User Manual


 
22
Exhaust Port Cleaning
Level 2.
Tools required: Torx T27 L-Wrench, Wood or plastic scraper
Parts Required: As needed: Heat Shield
1. Remove spark plug lead from spark plug, and remove mufer
cover (2 screws).
2. Place piston at top dead center. Remove mufer (A) and heat
shield (B).
3. Use a wood or plastic scraping tool to clean deposits from cylinder
exhaust port.
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.
4. Inspect heat shield, and replace if damaged.
5. Install heat shield and mufer.
6. Tighten mufer mounting bolts (or nuts) to 80-95 in•lbf
(90-110 kgf•cm).
7. Install mufer cover and attach spark plug lead.
8. Start engine, and warm to operating temperature.
9. Stop engine, and re-tighten mounting bolts (or nuts) to specica-
tions.
C
E
F
D
1. Remove engine cover screws (2) and engine cover (B).
2. Place piston at Top Dead Center (TDC) to prevent carbon/dirt from
entering cylinder.
3. Remove spark arrestor screen cover (C), gaskets (D), (E), and
screen (F), from mufer body.
4. Clean carbon deposits from mufer components.
NOTE
When cleaning carbon deposit, be careful not to damage the cata-
lytic element inside mufer.
5. Replace screen if it is cracked, plugged, or has holes burned
through.
6. Assemble components in reverse order.
A
B