Carburettor Adjustment Procedure; General Adjusting Rules; Presetting Idle Adjust Screw, L Mixture Needle And H Mixture Needle - Echo shindaiwa CS-360WES Service Data

CS-360WES

2 CARBURETTOR ADJUSTMENT PROCEDURE

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 fi lter element must be clean and properly installed.
3. The muffl er exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel fi lter 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" or "JASO FC/
FD" 2-stroke oil.
6. The recommended bar and chain must be installed, and properly tensioned.
NOTE : When the carburettor is changed with new
one, pass the fuel through fuel line pumping
primer (A) several times, and leave the unit for
one hour to dunk the carburettor diaphragm for
stable fuctioning before operating engine.
NOTE : In order to achieve proper carburettor adjustment, a 30, 35 or 40 cm bar and chain combination
should be installed on the unit, otherwise serious engine damage will occur due to overspeeding.
B. Preliminary adjustment. Adjustment by Idle adjust screw of carburetor.
Start and run engine for 100 seconds alternating engine speed between WOT and idle every 5 seconds.
Adjust idle adjust screw to 3,200 +/- 200 r/min. Make sure WOT engine speed in range 12,500 - 13,100
r/min. If engine does not run correctly after this adjustment, proceed to the next step 2-2.

2-2 Presetting Idle adjust screw, L mixture needle and H mixture needle

SERVICE INFORMATION
(D)
(C)
(B)
(A)
(A)
Tools Required : Small screwdriver with 2.5 mm
blade, P/N G310-000050 electronic tachometer,
P/N Y089-000091 D-shaped tool (A).
1. Turn L and H mixture needle clockwise until
lightly seated, and then turn out both mixture nee-
dles following turns.
L mixture needle (B) : 1 1/2
H mixture needle (C) : 2 1/8
NOTE : If needles are overtightened during seat-
ing, damage to carburettor may occur.
2. Remove air cleaner lid to expose the Idle adjust
screw and throttle plate. Turn Idle adjust screw (D)
anticlockwise until Idle adjust screw tip just touch-
es throttle plate. Then turn it clockwise 1 1/8 turns.
Reinstall air cleaner lid.
NOTE : The initial carburettor settings for Idle ad-
just screw, Idle and H mixture needles are intended
to start and run the engine before fi nal carburettor
adjustments are made through this procedure. The
actual number of turns needed for engine opera-
tion may vary.
7
(A)