PB-2520 MAINTENANCE
X7501190003 33
©10/2019 ECHO Inc.
Carburetor Adjustment
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 and
durability performance up to 335 m (1100 ft.) above sea level (ASL) (96.0
kPa). To maintain proper engine operation above 335 m (1100 ft.) ASL the
carburetor
may need to be adjusted by an authorized ECHO service dealer.
If the engine is adjusted for operation above 335 m (1100 ft.) ASL, the
carburetor must be re-adjusted when operating the engine below
335
m (1100 ft.) ASL, otherwise severe engine damage may result.
Level 2.
Note: Every unit is run at the factory and the carburetor is set in
compliance with emission regulations. Carburetor
adjustments, other than idle speed, must be performed by an
authorized ECHO dealer.
Before adjustment make sure that:
• Air filter is clean and properly installed.
• Spark arrestor screen is free of carbon.
• Blower pipes are installed.
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 minutes, operating
choke twice to clear air from carburetor chambers.
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