Echo PB-265ESL - Manual (Page 8)

SERVICE INFORMATION PB-265ESL
8
2-3 Adjusting carburettor
1. Start engine and warm it up alternating engine
speed between WOT and idle every 10 seconds
for 1 minute.
2. Adjust idle mixture needle (A) with 2.5 mm blade
screwdriver (E) to reach maximum engine speed
just before drop off.
3. Set idle speed to 3,500 r/min by turning idle ad-
just screw (D). Engine rpm should be stable at 3,500
+/- 10 r/min.
4. Turn idle mixture needle (A) anticlockwise to
reduce idle speed 500 to 600 r/min in the range of
2,900 to 3,000 r/min.
NOTE : Engine speed must be allowed to stabilize
a minimum of 20 seconds after each adjustment of
idle mixture needle to assure accurate tachometer
readings.
5. Adjust hi speed mixture needle (B) and obtain
maximum WOT engine speed just before lean drop
off using 2.5 mm blade screwdriver.
6. Turn hi speed mixture needle (B) anticlockwise
to reduce WOT engine speed 10-20 r/min. Mini-
mum WOT engine speed after adjusting should be
over 6,700 r/min.
7. Start engine, and verify engine idle speed rang-
es from 2,800 to 3,200 r/min, and WOT engine
speed ranges from 6,700 to 7,200 r/min. When
final adjustment is completed, the engine should
idle, accelerate smoothly, and attain WOT per
above specifi cation.
8. After adjusting carburettor, insert and secure
new plug(s) (F) A259-000010 deep in the needle
holes per the Emission Directive using limiter plug
tool.
NOTE : Engine WOT, and idle speed in field
operation may vary from fi nal adjustment specifi ca-
tions due to changing ambient conditions, fuel, and
engine loads. Safe engine speed variances should
be within the WOT and Idle speed ranges listed in
Section 1-1, otherwise the carburettor should be
readjusted.
(E)
(A)
(D)
(B)
(C)