Carburetor Adjustment Non Emission - Echo SHC-1700 - Type 1, SHC-1700 - Type 1E, SHC-2100 - Type 1, SHC-2100 - Type 1E, SHC-2400 - Type 1, SHC-2400 - Type 1E, HCA-2400 - Operator's Manual

7. Check idle speed and reset if necessary. If a tachometer is available,
idle speed should be set to the specification found on page 12
"Specifications" of this manual.
WARNING
When carburetor adjustment is completed, blades should not move
at idle, otherwise serious personal injury may result.
CARBURETOR ADJUSTMENT
Type 1 Models
Idle speed Adjustment (Unit running 2-3 minutes)
Turn "idle" speed adjustment screw CW (clockwise) until cutting
attachment begins to turn, then turn screw out CCW (counter clock-
wise) until attachment stops turning. Turn screw out, CCW (counter
clockwise) an additional 1/4 turn.
WARNING
Shaft Hedge Clipper blades must not move when unit is idling,
otherwise serious personal injury may result.
NOTE
If carburetor has limiter caps follow "Carburetor Adjustment"
procedures for Emission models on previous page.
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 LO needle (B) out, CCW 1-1/4 turns. Turn HI needle (A) out
CCW 2-3/4 turns.
Fine Tuning
(Requires Accurate Tachometer ECHO P/N 99051130017)
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 needle (B).
a. Lean drop-off - With engine idling, turn LO needle slowly
CW (in) to lean drop-off point. RPM will increase, then abruptly
drop-off. (1) Note this position.
b. Rich drop-off - With engine idling, slowly turn LO needle
CCW (out) to rich drop-off point. RPM will increase then
gradually slow and drop-off. (2) Note this position.
DANGER
DANGER
H C
EDGE
O ' M
PERATOR S
C
SHC-1700, 2100 TYPE 1E
SHC-1700, 2100 TYPE 1
A
C
A
C
SHC-2400
TYPE 1
1/8 TURN
MID POINT
RICH
RICH
DROP OFF
LIPPER
25
ANUAL
B
HCA-2400
TYPE 1
LEAN
DROP OFF