18

Cylinder Exhaust Port

Level3.

IMPORTANT

The cylinder exhaust port must be inspected and cleaned of excess carbon every 3 months or 90 hours of operation in order to maintain this engine within the emissions durability period. ECHO strongly

recommends that you return your unit to your ECHO dealer for this important maintenance service.

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 Adjustment

High altitude adjustment is not required for proper operation of this engine.

Level2.

Tools required: Screwdriver,tachometer(EchoP/N99051130017)

Parts required: None.

NOTE

Every unit is run at the factory and the carburetor is set in compliance with emission regulations. This carburetor does not have acceleration and high speed adjustment needles.

IdleAdjustment

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.

3. Check idle speed and reset if necessary. If a tachometer is available, idle speed screw (A) should be set to the specifications found on Page 21 "Specifications" of this manual. Turn idle screw

(A) clockwise to increase idle speed; counter clockwise to decrease idle speed.

A