Grass Trimmer/Brush Cutter 27 Operator's Manual
CARBURETOR ADJUSTMENT
Engine Break-In
New engines must be operated a minimum of two tanks of fuel before carburetor adjustments can be made. During the
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance up to 1,100 feet mean sea level (MSL) (96.0 kPa and below). To maintain proper engine operation and emission compliance above 1,100 feet MSL the carburetor may need to be adjusted by an authorized ECHO service dealer.
Important
If the engine is adjusted for operation above 1,100 feet MSL, the carburetor must be
Level 2.
Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017).
Parts required: None.
1.Before adjusting carburetor clean or replace air filter and muffler,
“Spark Arrestor Screen”.
2.Make sure the cutting attachment such as hedge clipper blades or circular saw are properly adjusted. Trimmer line should be extended to
3.Start engine and run several minutes to bring to operating tempera- ture. Flash choke twice during
4.Idle Speed Adjustment
•Start engine, turn “idle” speed adjustment screw clockwise
(CW) until the cutting attachment begins to turn, then turn screw out counterclockwise (CCW) until attachment stops turning. Turn screw out, CCW, an additional 1/4 turn.
WARNING
Cutting attachment must not turn or move when unit is idling.
caution
When starting, idling adjustment speed should be adjusted not to rotate the cutting attachment. Correct idle speed is adjusted 2300 to 2700 r/min. Or 1/4 turn CCW from the point the cutting attachment stops moving. When there is some trouble with the carburetor, refer to your dealer.
Idle speed adjustment screw (T)
