Echo CS-330T, CS-360T carburetor adjustment, Engine Break-In, High Altitude Operation, lo hi

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. Dur- ing 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 op- eration and emission compliance above 1,100 feet ASL the car- buretor may need to be adjusted by an authorized ECHO service dealer.

Important

If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the en- gine below 1,100 feet ASL, otherwise severe engine damage may result.

BEFORE MAKING ADJUSTMENTS:

•The correct spark plug must be clean and properly gapped.

•The air filter element must be clean and properly installed.

•The muffler spark arrestor screen and exhaust port must be clear of carbon.

•The standard bar and chain combination must be installed to the power head, and properly tensioned.

WARNING

When carburetor adjustment is completed, the saw chain should not move at idle, otherwise serious personal injury may result.

LOW ALTITUDE ADJUSTMENT

1.Start engine and run for several minutes to reach operating temperature.

2.Stop engine.

3.Start engine and turn the high-speed needle (A) rich (CCW) until the engine runs between 13,500 and 14,500 RPM. Then turn the low-speed needle (B) rich (CCW) until the engine does not hesitate when accelerated.

DO NOT REMOVE LIMITER CAPS!

4.Idle Speed Adjustment.

• Turn “idle” speed adjustment screw (C) CW until the saw chain begins to move, then turn the screw CCW until saw chain stops moving. Turn screw CCW an additional 1/4 turn.

5.Accelerate to full throttle for 2-3 seconds to clear excess fuel from engine then return to idle. Accelerate to full throttle to check for smooth transition from idle to full throttle. If engine stops or stalls after full warm up return the unit to your autho- rized ECHO dealer for adjustment.

C

A

B

BA

lo hi

22