Carburetor Adjustment Non Emission - Echo PE-2000 1 Operator's Manual

CARBURETOR ADJUSTMENT
Type 1 Non-Emission Models
NOTE
If carburetor has limiter caps follow "Carburetor Adjustment" proce-
dures for Type 1E models on previous page.
Idle Speed Adjustment
Turn "idle" speed adjustment screw (C) CW (clockwise) until cutting
attachment begins to turn, then turn screw out CCW (counter clock-
wise) until cutting attachment stops turning. Turn screw out, CCW an
additional 1/4 turn.
WARNING
Blade must not turn when unit is idling, otherwise serious personal
injury may result.
Basic Setting
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 needles out CCW
PE-2000 LO (B) 1-3/8 turns; HI (A) 1-7/8 turns
PE-2400 LO (B) 2-1/2 turns; HI (A) 2-1/4 turns
PE-3100 LO (B) 1-1/8 turns; HI (A) 1-1/8 turns
Fine Tuning
(Requires Accurate Tachometer)
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 12.
4. Check idle speed and reset if necessary. If tachometer is available,
idle speed should be set to the specifications found on page 12
"Specifications" of this manual.
WARNING
When carburetor adjustment is completed, the blade should not turn
at idle, otherwise serious personal injury may result.
DANGER
DANGER
P
OWER
O ' M
PERATOR S
A
C
PE-2000
A
C
PE-2400
PE-3100
(3)
(4)
(2)
E
DGER
25
ANUAL
B
B
(1)
F