LOWALTITUDEADJUSTMENT

Engines that have been adjusted to operate at high altitudes must be readjusted to operate properly at altitudes below 2000 feet.

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 authorized ECHO dealer for adjustment.

HIGHALTITUDEADJUSTMENT

High altitude adjustment may be required for proper operation of this engine above 2000 feet.

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

2.Stop engine.

3.Start engine and turn the HI speed needle (A) lean (CW) until the engine runs between 13,500 and 14,500 RPM. Then turn the LO speed needle lean (B) (CW) 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 authorized ECHO dealer for adjustment.

C

A

B

LO HI

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