MAINTENANCE SRM-225
34 X7722279402
© 2/2016 ECHO Inc.
1. Remove spark plug lead from
spark plug, and remove
engine cover.
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.
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 muffler.
6. Tighten muffler mounting bolts
(or nuts) to 90-110 kgf•cm
(80-95 in•lbf).
7. Install engine 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 specifications.
Carburetor Adjustment
Level 2.
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel break-in
before carburetor adjustments can be made. During the break-in period your
engine performance will increase and exhaust emissions will stabilize. Idle
speed can be adjusted as required.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting,
emission, and durability performance up to 1,100 feet above sea level (ASL)
(96.0 kPa). To maintain proper engine operation and emission compliance
above 1,100 feet ASL the carburetor may
need to be adjusted by an authorized
ECHO service dealer.
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