Echo TC-2100 OPERATOR'S MANUAL 21

TILLER/CULTIVATOR

OPERATOR'S MANUAL 21

Level 2

Tools Required: Screwdriver, Tachometer (ECHO P/N 90051130017).

NOTE

If carburetor has limiter caps follow "Carburetor Adjustment"

procedures for emission models on previous page.

Turn "idle" speed adjustment screw (C) CW (clockwise) until tines

begin to turn, then turn screw out CCW (counter clockwise) until tines

stop turning. Turn screw out, CCW an additional 1/4 turn.

Tines must not turn when unit is idling, otherwise serious personal injury may result.

1. Stop engine and turn both LO (B) and HI (A) needles in, CW until

they stop and are lightly seated.

IMPORTANT

DO NOT over tighten needles. Forcing them to tighten will

damage the carburetor.

2. Turn LO (B) needle out, CCW 2-1/2 turns. Turn HI (A) needle out

CCW 2-3/4 turns.

1. Start engine and allow to warm to operating temperature (minimum

2 - 3 minutes) varying engine speed from idle to full throttle.

2. Always begin fine tuning with LO (B) needle.

a. Lean drop-off - With engine idling, turn LO (B) needle slowly

CW (in) to lean drop-off point. RPM will increase, then abruptly

drop-off. Note this position. (1)

b. Rich drop-off - With engine idling, slowly turn LO (B) needle

CCW (out) to rich drop-off point. RPM will increase then

gradually slow and drop-off. Note this position. (2)

c. Final setting - Set needle at mid point between lean rich drop-

off points. (3)

d. Turn needle 1/8 turn CCW (out) making mixture slightly

richer. (4)

3. HI speed adjustment.

Adjust HI (A) needle with tachometer. Refer to Wide Open

Throttle RPM settings listed in "Specifications" on page 10.

4. Check idle speed and reset if necessary. If tachometer is available,

idle speed should be set to the specifications found on page 10

"Specifications" of this manual.

When carburetor adjustment is completed, tines should not move

at idle, otherwise serious personal injury may result.