Echo CS-2600ES - Manual (Page 8)

SERVICE INFORMATION
CS-2600ES
CS-2700ES 8
(continued)
2 EMISSION ADJUSTMENT GUIDE
2-1 General adjusting rules
A. Before starting the unit for adjustment, check the following items.
1. The correct spark plug must be clean and properly gapped.
2. The air filter element must be clean and properly installed.
3. The muffler exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel filter are in good condition and clear of debris.
5. The fuel is fresh ( > 89 octane : RON) and properly mixed at 50 : 1 with “ISO L-EGD” 2-stroke oil.
6. The recommended bar and chain must be installed to the power head, and properly tensioned.
NOTE : Make sure of proper installation of guide bar and saw chain when adjusting carburettor, or
serious engine damage will occur due to overspeeding.
B. Adjust carburettor turning L and H mixture needles with limiter caps within the moving range (approx. 90
°
)
and idle adjust screw. When engine does not run correctly after this adjustment, proceed to the next step
(2-2).
C. After adjusting carburettor according to the steps 2-2 and 2-3, the limiter cap(s) must be installed on L
and/or H mixture needle(s) to comply with Emission Directive.
2-2 Presetting idle adjust screw, L mixture needle and H mixture needle
1. Turn the L and H mixture needles anticlockwise
to rich side stop and meet limiter caps tabs (A) with
locating slot (B), using 3 mm blade screw driver.
2. Screw left hand thread of limiter cap tool 91019
into centre hoIe of limiter cap anticlockwise until tab
of the limiter cap just come out from locating slot.
NOTE : If cap tabs (A) misalign with locating slots
(B), there is a chance to strip thread. When the
thread is stripped by limiter cap tool, screw 3 mm
wood screw in the stripped centre hole of the limiter
cap, and pull off the cap.
H
L
(A)
(B)
(B)
(A)