Echo SRM - 410U User Manual

Page 27

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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)

WARNING

Cutting attachment must not turn or move when unit is idling.

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 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 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 re-adjusted when operating the engine below

1,100 feet MSL, otherwise severe engine damage can result.

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 cut-off knife.

3. Start engine and run several minutes to bring to operating tempera-

ture. Flash choke twice during warm-up to clear any air from the

fuel system.

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.